Merge branch 'master' of git://github.com/lifo/docrails

21 files changed, 439 insertions, 277 deletions

diff --git a/actionpack/lib/action_view/helpers/date_helper.rb b/actionpack/lib/action_view/helpers/date_helper.rb
index 6a724749f4..e850c258ce 100644
--- a/actionpack/lib/action_view/helpers/date_helper.rb
+++ b/actionpack/lib/action_view/helpers/date_helper.rb
@@ -8,8 +8,8 @@ module ActionView
   module Helpers
     # = Action View Date Helpers
     #
-    # The Date Helper primarily creates select/option tags for different kinds of dates and date elements. All of the
-    # select-type methods share a number of common options that are as follows:
+    # The Date Helper primarily creates select/option tags for different kinds of dates and times or date and time
+    # elements. All of the select-type methods share a number of common options that are as follows:
     #
     # * <tt>:prefix</tt> - overwrites the default prefix of "date" used for the select names. So specifying "birthday"
     # would give birthday[month] instead of date[month] if passed to the <tt>select_month</tt> method.
@@ -18,7 +18,7 @@ module ActionView
     #   the <tt>select_month</tt> method would use simply "date" (which can be overwritten using <tt>:prefix</tt>) instead
     #   of "date[month]".
     module DateHelper
-      # Reports the approximate distance in time between two Time or Date objects or integers as seconds.
+      # Reports the approximate distance in time between two Time, Date or DateTime objects or integers as seconds.
       # Set <tt>include_seconds</tt> to true if you want more detailed approximations when distance < 1 min, 29 secs.
       # Distances are reported based on the following table:
       #
@@ -176,37 +176,37 @@ module ActionView
       # NOTE: Discarded selects will default to 1. So if no month select is available, January will be assumed.
       #
       # ==== Examples
-      #   # Generates a date select that when POSTed is stored in the post variable, in the written_on attribute.
-      #   date_select("post", "written_on")
+      #   # Generates a date select that when POSTed is stored in the article variable, in the written_on attribute.
+      #   date_select("article", "written_on")
       #
-      #   # Generates a date select that when POSTed is stored in the post variable, in the written_on attribute,
+      #   # Generates a date select that when POSTed is stored in the article variable, in the written_on attribute,
       #   # with the year in the year drop down box starting at 1995.
-      #   date_select("post", "written_on", :start_year => 1995)
+      #   date_select("article", "written_on", :start_year => 1995)
       #
-      #   # Generates a date select that when POSTed is stored in the post variable, in the written_on attribute,
+      #   # Generates a date select that when POSTed is stored in the article variable, in the written_on attribute,
       #   # with the year in the year drop down box starting at 1995, numbers used for months instead of words,
       #   # and without a day select box.
-      #   date_select("post", "written_on", :start_year => 1995, :use_month_numbers => true,
+      #   date_select("article", "written_on", :start_year => 1995, :use_month_numbers => true,
       #                                     :discard_day => true, :include_blank => true)
       #
-      #   # Generates a date select that when POSTed is stored in the post variable, in the written_on attribute
+      #   # Generates a date select that when POSTed is stored in the article variable, in the written_on attribute
       #   # with the fields ordered as day, month, year rather than month, day, year.
-      #   date_select("post", "written_on", :order => [:day, :month, :year])
+      #   date_select("article", "written_on", :order => [:day, :month, :year])
       #
       #   # Generates a date select that when POSTed is stored in the user variable, in the birthday attribute
       #   # lacking a year field.
       #   date_select("user", "birthday", :order => [:month, :day])
       #
-      #   # Generates a date select that when POSTed is stored in the post variable, in the written_on attribute
+      #   # Generates a date select that when POSTed is stored in the article variable, in the written_on attribute
       #   # which is initially set to the date 3 days from the current date
-      #   date_select("post", "written_on", :default => 3.days.from_now)
+      #   date_select("article", "written_on", :default => 3.days.from_now)
       #
       #   # Generates a date select that when POSTed is stored in the credit_card variable, in the bill_due attribute
       #   # that will have a default day of 20.
       #   date_select("credit_card", "bill_due", :default => { :day => 20 })
       #
       #   # Generates a date select with custom prompts.
-      #   date_select("post", "written_on", :prompt => { :day => 'Select day', :month => 'Select month', :year => 'Select year' })
+      #   date_select("article", "written_on", :prompt => { :day => 'Select day', :month => 'Select month', :year => 'Select year' })
       #
       # The selects are prepared for multi-parameter assignment to an Active Record object.
       #
@@ -228,20 +228,20 @@ module ActionView
       # If anything is passed in the html_options hash it will be applied to every select tag in the set.
       #
       # ==== Examples
-      #   # Creates a time select tag that, when POSTed, will be stored in the post variable in the sunrise attribute.
-      #   time_select("post", "sunrise")
+      #   # Creates a time select tag that, when POSTed, will be stored in the article variable in the sunrise attribute.
+      #   time_select("article", "sunrise")
       #
-      #   # Creates a time select tag with a seconds field that, when POSTed, will be stored in the post variables in
+      #   # Creates a time select tag with a seconds field that, when POSTed, will be stored in the article variables in
       #   # the sunrise attribute.
-      #   time_select("post", "start_time", :include_seconds => true)
+      #   time_select("article", "start_time", :include_seconds => true)
       #
       #   # You can set the <tt>:minute_step</tt> to 15 which will give you: 00, 15, 30 and 45.
       #   time_select 'game', 'game_time', {:minute_step => 15}
       #
       #   # Creates a time select tag with a custom prompt. Use <tt>:prompt => true</tt> for generic prompts.
-      #   time_select("post", "written_on", :prompt => {:hour => 'Choose hour', :minute => 'Choose minute', :second => 'Choose seconds'})
-      #   time_select("post", "written_on", :prompt => {:hour => true}) # generic prompt for hours
-      #   time_select("post", "written_on", :prompt => true) # generic prompts for all
+      #   time_select("article", "written_on", :prompt => {:hour => 'Choose hour', :minute => 'Choose minute', :second => 'Choose seconds'})
+      #   time_select("article", "written_on", :prompt => {:hour => true}) # generic prompt for hours
+      #   time_select("article", "written_on", :prompt => true) # generic prompts for all
       #
       #   # You can set :ampm option to true which will show the hours as: 12 PM, 01 AM .. 11 PM.
       #   time_select 'game', 'game_time', {:ampm => true}
@@ -261,36 +261,36 @@ module ActionView
       # If anything is passed in the html_options hash it will be applied to every select tag in the set.
       #
       # ==== Examples
-      #   # Generates a datetime select that, when POSTed, will be stored in the post variable in the written_on
+      #   # Generates a datetime select that, when POSTed, will be stored in the article variable in the written_on
       #   # attribute.
-      #   datetime_select("post", "written_on")
+      #   datetime_select("article", "written_on")
       #
       #   # Generates a datetime select with a year select that starts at 1995 that, when POSTed, will be stored in the
-      #   # post variable in the written_on attribute.
-      #   datetime_select("post", "written_on", :start_year => 1995)
+      #   # article variable in the written_on attribute.
+      #   datetime_select("article", "written_on", :start_year => 1995)
       #
       #   # Generates a datetime select with a default value of 3 days from the current time that, when POSTed, will
       #   # be stored in the trip variable in the departing attribute.
       #   datetime_select("trip", "departing", :default => 3.days.from_now)
       #
       #   # Generate a datetime select with hours in the AM/PM format
-      #   datetime_select("post", "written_on", :ampm => true)
+      #   datetime_select("article", "written_on", :ampm => true)
       #
-      #   # Generates a datetime select that discards the type that, when POSTed, will be stored in the post variable
+      #   # Generates a datetime select that discards the type that, when POSTed, will be stored in the article variable
       #   # as the written_on attribute.
-      #   datetime_select("post", "written_on", :discard_type => true)
+      #   datetime_select("article", "written_on", :discard_type => true)
       #
       #   # Generates a datetime select with a custom prompt. Use <tt>:prompt => true</tt> for generic prompts.
-      #   datetime_select("post", "written_on", :prompt => {:day => 'Choose day', :month => 'Choose month', :year => 'Choose year'})
-      #   datetime_select("post", "written_on", :prompt => {:hour => true}) # generic prompt for hours
-      #   datetime_select("post", "written_on", :prompt => true) # generic prompts for all
+      #   datetime_select("article", "written_on", :prompt => {:day => 'Choose day', :month => 'Choose month', :year => 'Choose year'})
+      #   datetime_select("article", "written_on", :prompt => {:hour => true}) # generic prompt for hours
+      #   datetime_select("article", "written_on", :prompt => true) # generic prompts for all
       #
       # The selects are prepared for multi-parameter assignment to an Active Record object.
       def datetime_select(object_name, method, options = {}, html_options = {})
         InstanceTag.new(object_name, method, self, options.delete(:object)).to_datetime_select_tag(options, html_options)
       end
 
-      # Returns a set of html select-tags (one for year, month, day, hour, and minute) pre-selected with the
+      # Returns a set of html select-tags (one for year, month, day, hour, minute, and second) pre-selected with the
       # +datetime+. It's also possible to explicitly set the order of the tags using the <tt>:order</tt> option with
       # an array of symbols <tt>:year</tt>, <tt>:month</tt> and <tt>:day</tt> in the desired order. If you do not
       # supply a Symbol, it will be appended onto the <tt>:order</tt> passed in. You can also add
@@ -343,15 +343,15 @@ module ActionView
 
       # Returns a set of html select-tags (one for year, month, and day) pre-selected with the +date+.
       # It's possible to explicitly set the order of the tags using the <tt>:order</tt> option with an array of
-      # symbols <tt>:year</tt>, <tt>:month</tt> and <tt>:day</tt> in the desired order. If you do not supply a Symbol,
-      # it will be appended onto the <tt>:order</tt> passed in.
+      # symbols <tt>:year</tt>, <tt>:month</tt> and <tt>:day</tt> in the desired order.
+      # If the array passed to the <tt>:order</tt> option does not contain all the three symbols, all tags will be hidden.
       #
       # If anything is passed in the html_options hash it will be applied to every select tag in the set.
       #
       # ==== Examples
-      #   my_date = Time.today + 6.days
+      #   my_date = Time.now + 6.days
       #
-      #   # Generates a date select that defaults to the date in my_date (six days afteri today).
+      #   # Generates a date select that defaults to the date in my_date (six days after today).
       #   select_date(my_date)
       #
       #   # Generates a date select that defaults to today (no specified date).
@@ -422,7 +422,7 @@ module ActionView
       end
 
       # Returns a select tag with options for each of the seconds 0 through 59 with the current second selected.
-      # The <tt>second</tt> can also be substituted for a second number.
+      # The <tt>datetime</tt> can be either a +Time+ or +DateTime+ object or an integer.      
       # Override the field name using the <tt>:field_name</tt> option, 'second' by default.
       #
       # ==== Examples
@@ -440,7 +440,7 @@ module ActionView
       #
       #   # Generates a select field for seconds with a custom prompt. Use <tt>:prompt => true</tt> for a
       #   # generic prompt.
-      #   select_minute(14, :prompt => 'Choose seconds')
+      #   select_second(14, :prompt => 'Choose seconds')
       #
       def select_second(datetime, options = {}, html_options = {})
         DateTimeSelector.new(datetime, options, html_options).select_second
@@ -448,21 +448,21 @@ module ActionView
 
       # Returns a select tag with options for each of the minutes 0 through 59 with the current minute selected.
       # Also can return a select tag with options by <tt>minute_step</tt> from 0 through 59 with the 00 minute
-      # selected. The <tt>minute</tt> can also be substituted for a minute number.
+      # selected. The <tt>datetime</tt> can be either a +Time+ or +DateTime+ object or an integer. 
       # Override the field name using the <tt>:field_name</tt> option, 'minute' by default.
       #
       # ==== Examples
       #   my_time = Time.now + 6.hours
       #
-      #   # Generates a select field for minutes that defaults to the minutes for the time in my_tiime.
+      #   # Generates a select field for minutes that defaults to the minutes for the time in my_time.
       #   select_minute(my_time)
       #
       #   # Generates a select field for minutes that defaults to the number given.
       #   select_minute(14)
       #
       #   # Generates a select field for minutes that defaults to the minutes for the time in my_time
-      #   # that is named 'stride' rather than 'second'.
-      #   select_minute(my_time, :field_name => 'stride')
+      #   # that is named 'moment' rather than 'minute'.
+      #   select_minute(my_time, :field_name => 'moment')
       #
       #   # Generates a select field for minutes with a custom prompt. Use <tt>:prompt => true</tt> for a
       #   # generic prompt.
@@ -473,7 +473,7 @@ module ActionView
       end
 
       # Returns a select tag with options for each of the hours 0 through 23 with the current hour selected.
-      # The <tt>hour</tt> can also be substituted for a hour number.
+      # The <tt>datetime</tt> can be either a +Time+ or +DateTime+ object or an integer.      
       # Override the field name using the <tt>:field_name</tt> option, 'hour' by default.
       #
       # ==== Examples
@@ -485,8 +485,8 @@ module ActionView
       #   # Generates a select field for hours that defaults to the number given.
       #   select_hour(13)
       #
-      #   # Generates a select field for hours that defaults to the minutes for the time in my_time
-      #   # that is named 'stride' rather than 'second'.
+      #   # Generates a select field for hours that defaults to the hour for the time in my_time
+      #   # that is named 'stride' rather than 'hour'.
       #   select_hour(my_time, :field_name => 'stride')
       #
       #   # Generates a select field for hours with a custom prompt. Use <tt>:prompt => true</tt> for a
@@ -501,11 +501,11 @@ module ActionView
       end
 
       # Returns a select tag with options for each of the days 1 through 31 with the current day selected.
-      # The <tt>date</tt> can also be substituted for a hour number.
+      # The <tt>date</tt> can also be substituted for a day number.
       # Override the field name using the <tt>:field_name</tt> option, 'day' by default.
       #
       # ==== Examples
-      #   my_date = Time.today + 2.days
+      #   my_date = Time.now + 2.days
       #
       #   # Generates a select field for days that defaults to the day for the date in my_date.
       #   select_day(my_time)
diff --git a/actionpack/lib/action_view/helpers/form_helper.rb b/actionpack/lib/action_view/helpers/form_helper.rb
index 3a30263b49..724fe7a518 100644
--- a/actionpack/lib/action_view/helpers/form_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_helper.rb
@@ -49,7 +49,7 @@ module ActionView
     #     <label for="person_last_name">Last name</label>:
     #     <input id="person_last_name" name="person[last_name]" size="30" type="text" /><br />
     #
-    #     <input id="person_submit" name="commit" type="submit" value="Create Person" />
+    #     <input name="commit" type="submit" value="Create Person" />
     #   </form>
     #
     # As you see, the HTML reflects knowledge about the resource in several spots,
@@ -80,7 +80,7 @@ module ActionView
     #     <label for="person_last_name">Last name</label>:
     #     <input id="person_last_name" name="person[last_name]" size="30" type="text" value="Smith" /><br />
     #
-    #     <input id="person_submit" name="commit" type="submit" value="Update Person" />
+    #     <input name="commit" type="submit" value="Update Person" />
     #   </form>
     #
     # Note that the endpoint, default values, and submit button label are tailored for <tt>@person</tt>.
@@ -233,7 +233,7 @@ module ActionView
       #   <% end %>
       #
       # If your resource has associations defined, for example, you want to add comments
-      # to the post given that the routes are set correctly:
+      # to the document given that the routes are set correctly:
       #
       #   <%= form_for([@document, @comment]) do |f| %>
       #    ...
@@ -859,7 +859,28 @@ module ActionView
         InstanceTag.new(object_name, method, self, options.delete(:object)).to_radio_button_tag(tag_value, options)
       end
 
-      # Returns a text_field of type "search".
+      # Returns an input of type "search" for accessing a specified attribute (identified by +method+) on an object
+      # assigned to the template (identified by +object_name+). Inputs of type "search" may be styled differently by
+      # some browsers.
+      #
+      # ==== Examples
+      #
+      #   search_field(:user, :name)
+      #   # => <input id="user_name" name="user[name]" size="30" type="search" />
+      #   search_field(:user, :name, :autosave => false)
+      #   # => <input autosave="false" id="user_name" name="user[name]" size="30" type="search" />
+      #   search_field(:user, :name, :results => 3)
+      #   # => <input id="user_name" name="user[name]" results="3" size="30" type="search" />
+      #   #  Assume request.host returns "www.example.com"
+      #   search_field(:user, :name, :autosave => true)
+      #   # => <input autosave="com.example.www" id="user_name" name="user[name]" results="10" size="30" type="search" />
+      #   search_field(:user, :name, :onsearch => true)
+      #   # => <input id="user_name" incremental="true" name="user[name]" onsearch="true" size="30" type="search" />
+      #   search_field(:user, :name, :autosave => false, :onsearch => true)
+      #   # => <input autosave="false" id="user_name" incremental="true" name="user[name]" onsearch="true" size="30" type="search" />
+      #   search_field(:user, :name, :autosave => true, :onsearch => true)
+      #   # => <input autosave="com.example.www" id="user_name" incremental="true" name="user[name]" onsearch="true" results="10" size="30" type="search" />
+      #
       def search_field(object_name, method, options = {})
         options = options.stringify_keys
 
@@ -878,17 +899,29 @@ module ActionView
       end
 
       # Returns a text_field of type "tel".
+      #
+      #   telephone_field("user", "phone")
+      #   # => <input id="user_phone" name="user[phone]" size="30" type="tel" />
+      #
       def telephone_field(object_name, method, options = {})
         InstanceTag.new(object_name, method, self, options.delete(:object)).to_input_field_tag("tel", options)
       end
       alias phone_field telephone_field
 
       # Returns a text_field of type "url".
+      #
+      #   url_field("user", "homepage")
+      #   # => <input id="user_homepage" size="30" name="user[homepage]" type="url" />
+      #
       def url_field(object_name, method, options = {})
         InstanceTag.new(object_name, method, self, options.delete(:object)).to_input_field_tag("url", options)
       end
 
       # Returns a text_field of type "email".
+      #
+      #   email_field("user", "address")
+      #   # => <input id="user_address" size="30" name="user[address]" type="email" />
+      #
       def email_field(object_name, method, options = {})
         InstanceTag.new(object_name, method, self, options.delete(:object)).to_input_field_tag("email", options)
       end
diff --git a/actionpack/lib/action_view/renderer/partial_renderer.rb b/actionpack/lib/action_view/renderer/partial_renderer.rb
index 24df3af0e4..51c784493e 100644
--- a/actionpack/lib/action_view/renderer/partial_renderer.rb
+++ b/actionpack/lib/action_view/renderer/partial_renderer.rb
@@ -12,8 +12,7 @@ module ActionView
   #
   #  <%= render :partial => "account" %>
   #
-  # This would render "advertiser/_account.html.erb" and pass the instance variable @account in as a local variable
-  # +account+ to the template for display.
+  # This would render "advertiser/_account.html.erb".
   #
   # In another template for Advertiser#buy, we could have:
   #
@@ -28,32 +27,24 @@ module ActionView
   #
   # == The :as and :object options
   #
-  # By default <tt>ActionView::Partials::PartialRenderer</tt> has its object in a local variable with the same
-  # name as the template. So, given
+  # By default <tt>ActionView::Partials::PartialRenderer</tt> doesn't have any local variables.
+  # The <tt>:object</tt> option can be used to pass an object to the partial. For instance:
   #
-  #   <%= render :partial => "contract" %>
+  #   <%= render :partial => "account", :object => @buyer %>
   #
-  # within contract we'll get <tt>@contract</tt> in the local variable +contract+, as if we had written
+  # would provide the +@buyer+ object to the partial, available under the local variable +account+ and is
+  # equivalent to:
   #
-  #   <%= render :partial => "contract", :locals => { :contract  => @contract } %>
+  #   <%= render :partial => "account", :locals => { :account => @buyer } %>
   #
   # With the <tt>:as</tt> option we can specify a different name for said local variable. For example, if we
-  # wanted it to be +agreement+ instead of +contract+ we'd do:
-  #
-  #   <%= render :partial => "contract", :as => 'agreement' %>
-  #
-  # The <tt>:object</tt> option can be used to directly specify which object is rendered into the partial;
-  # useful when the template's object is elsewhere, in a different ivar or in a local variable for instance.
+  # wanted it to be +user+ instead of +account+ we'd do:
   #
-  # Revisiting a previous example we could have written this code:
+  #   <%= render :partial => "account", :object => @buyer, :as => 'user' %>
   #
-  #   <%= render :partial => "account", :object => @buyer %>
-  #
-  #   <% @advertisements.each do |ad| %>
-  #     <%= render :partial => "ad", :object => ad %>
-  #   <% end %>
+  # This is equivalent to
   #
-  # The <tt>:object</tt> and <tt>:as</tt> options can be used together.
+  #   <%= render :partial => "account", :locals => { :user => @buyer } %>
   #
   # == Rendering a collection of partials
   #
diff --git a/activemodel/README.rdoc b/activemodel/README.rdoc
index b5b5edd52a..a0e6b4d9b3 100644
--- a/activemodel/README.rdoc
+++ b/activemodel/README.rdoc
@@ -182,3 +182,30 @@ modules:
    p.valid?                  # =>  true
 
   {Learn more}[link:classes/ActiveModel/Validator.html]
+  
+
+== Download and installation
+
+The latest version of Active Model can be installed with Rubygems:
+
+  % [sudo] gem install activemodel
+
+Source code can be downloaded as part of the Rails project on GitHub
+
+* https://github.com/rails/rails/tree/master/activemodel/
+
+
+== License
+
+Active Model is released under the MIT license.
+
+
+== Support
+
+API documentation is at
+
+* http://api.rubyonrails.org
+
+Bug reports and feature requests can be filed with the rest for the Ruby on Rails project here:
+
+* https://github.com/rails/rails/issues
diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb
index 166cccf161..e3e71525fa 100644
--- a/activemodel/lib/active_model/dirty.rb
+++ b/activemodel/lib/active_model/dirty.rb
@@ -29,7 +29,7 @@ module ActiveModel
   #
   #     include ActiveModel::Dirty
   #
-  #     define_attribute_methods [:name]
+  #     define_attribute_methods = [:name]
   #
   #     def name
   #       @name
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 25074c2d4f..99ed273a8a 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1738,7 +1738,7 @@ MSG
       end
 
       # Returns an <tt>#inspect</tt>-like string for the value of the
-      # attribute +attr_name+. String attributes are elided after 50
+      # attribute +attr_name+. String attributes are truncated upto 50
       # characters, and Date and Time attributes are returned in the
       # <tt>:db</tt> format. Other attributes return the value of
       # <tt>#inspect</tt> without modification.
diff --git a/activesupport/lib/active_support/inflector/methods.rb b/activesupport/lib/active_support/inflector/methods.rb
index 3d28d33f40..423b5abd20 100644
--- a/activesupport/lib/active_support/inflector/methods.rb
+++ b/activesupport/lib/active_support/inflector/methods.rb
@@ -118,8 +118,10 @@ module ActiveSupport
     # +titleize+ is also aliased as as +titlecase+.
     #
     # Examples:
-    #   "man from the boondocks".titleize # => "Man From The Boondocks"
-    #   "x-men: the last stand".titleize  # => "X Men: The Last Stand"
+    #   "man from the boondocks".titleize   # => "Man From The Boondocks"
+    #   "x-men: the last stand".titleize    # => "X Men: The Last Stand"
+    #   "TheManWithoutAPast".titleize       # => "The Man Without A Past"
+    #   "raiders_of_the_lost_ark".titleize  # => "Raiders Of The Lost Ark"
     def titleize(word)
       humanize(underscore(word)).gsub(/\b('?[a-z])/) { $1.capitalize }
     end
diff --git a/activesupport/lib/active_support/multibyte/chars.rb b/activesupport/lib/active_support/multibyte/chars.rb
index f9607f1aaf..b78d92f599 100644
--- a/activesupport/lib/active_support/multibyte/chars.rb
+++ b/activesupport/lib/active_support/multibyte/chars.rb
@@ -331,8 +331,7 @@ module ActiveSupport #:nodoc:
       # when the storage for a string is limited for some reason.
       #
       # Example:
-      #   s = 'こんにちは'
-      #   s.mb_chars.limit(7) # => "こに"
+      #   'こんにちは'.mb_chars.limit(7).to_s # => "こん"
       def limit(limit)
         slice(0...translate_offset(limit))
       end
diff --git a/railties/guides/source/active_record_querying.textile b/railties/guides/source/active_record_querying.textile
index 082f9eda7d..8ea06d28aa 100644
--- a/railties/guides/source/active_record_querying.textile
+++ b/railties/guides/source/active_record_querying.textile
@@ -1016,6 +1016,7 @@ You can specify an exclamation point (<tt>!</tt>) on the end of the dynamic find
 
 If you want to find both by name and locked, you can chain these finders together by simply typing +and+ between the fields. For example, +Client.find_by_first_name_and_locked("Ryan", true)+.
 
+WARNING: Up to and including Rails 3.1, when the number of arguments passed to a dynamic finder method is lesser than the number of fields, say <tt>Client.find_by_name_and_locked("Ryan")</tt>, the behavior is to pass +nil+ as the missing argument. This is *unintentional* and this behavior will be changed in Rails 3.2 to throw an +ArgumentError+.
 
 There's another set of dynamic finders that let you find or create/initialize objects if they aren't found. These work in a similar fashion to the other finders and can be used like +find_or_create_by_first_name(params[:first_name])+. Using this will first perform a find and then create if the find returns +nil+. The SQL looks like this for +Client.find_or_create_by_first_name("Ryan")+:
 
diff --git a/railties/guides/source/asset_pipeline.textile b/railties/guides/source/asset_pipeline.textile
index 563c1c79ae..5999c78369 100644
--- a/railties/guides/source/asset_pipeline.textile
+++ b/railties/guides/source/asset_pipeline.textile
@@ -11,9 +11,9 @@ By referring to this guide you will be able to:
 
 endprologue.
 
-h3. What Is The Asset Pipeline?
+h3. What is the Asset Pipeline?
 
-The asset pipeline provides a framework to concatenate and minify or compress Javascript and CSS assets. It also adds the ability to write these assets in other languages such as CoffeeScript, SCSS and ERB.
+The asset pipeline provides a framework to concatenate and minify or compress JavaScript and CSS assets. It also adds the ability to write these assets in other languages such as CoffeeScript, SCSS and ERB.
 
 Prior to Rails 3.1 these features were added through third-party Ruby libraries such as Jammit and Sprockets. Rails 3.1 includes the +sprockets-rails+ gem, which depends on the +sprockets+ gem, by default.
 
@@ -22,7 +22,7 @@ By having this as a core feature of Rails, all developers can benefit from the p
 In new Rails 3.1 application the asset pipeline is enable by default. It can be disabled in +application.rb+ by putting this line inside the +Application+ class definition:
 
 <plain>
-  config.assets.enabled = false
+config.assets.enabled = false
 </plain>
 
 It is recommended that you use the defaults for all new apps.
@@ -30,21 +30,19 @@ It is recommended that you use the defaults for all new apps.
 
 h4. Main Features
 
-The first is to concatenate of assets. This is important in a production environment to reduce the number of requests that a client browser has to make to render a web page. While Rails already has a feature to concatenate these types of asset--by placing +:cache => true+ at the end of tags such as +javascript_include_tag+ and +stylesheet_link_tag+--, many people do not use it.
+The first feature of the pipeline is to concatenate assets. This is important in a production environment, as it reduces the number of requests that a browser needs to make to render a web page. While Rails already has a feature to concatenate these types of asset--by placing +:cache => true+ at the end of tags such as +javascript_include_tag+ and +stylesheet_link_tag+--, many people do not use it.
 
-The default behavior in Rails 3.1 and onward is to concatenate all files into one master file each for JS and CSS, however you can separate files or groups of files if required (see below). In production an MD5 fingerprint is inserted into each filename.
+The default behavior in Rails 3.1 and onward is to concatenate all files into one master file each for JS and CSS. However, you can separate files or groups of files if required (see below). In production an MD5 fingerprint is inserted into each filename so that the file is cached by the web browser but can be invalidated if the fingerprint is altered.
 
-The second feature of the pipeline is to minify or compress. For CSS this usually involves removing whitespace and comments. For Javascript more complex processes can be applied.
+The second feature is to minify or compress. For CSS, this usually involves removing whitespace and comments. For JavaScript, more complex processes can be applied. You can choose from a set of built in options or specify your own.
 
-You can choose from a set of built in options or specify your own.
+The third feature is the ability to code these assets using another language, or language extension. These include SCSS or Sass for CSS, CoffeeScript for JavaScript, and ERB for both.
 
-The third feature is the ability to code these assets using another language, or language extension. These include SCSS or Sass for CSS, CoffeeScript for Javascript, and ERB for both.
-
-h4. What is fingerprinting and why should I care?
+h4. What is Fingerprinting and Why Should I Care?
 
 Fingerprinting is a technique where the filenames of content that is static or infrequently updated is altered to be unique to the content contained in the file.
 
-When a filename is unique and based on its content, http headers can be set to encourage caches everywhere (at ISPs, in browsers) to keep there own copy of the content. When the content is updated, the fingerprint will change and the remote clients will request the new file. This is generally known as _cachebusting_.
+When a filename is unique and based on its content, HTTP headers can be set to encourage caches everywhere (at ISPs, in browsers) to keep their own copy of the content. When the content is updated, the fingerprint will change and the remote clients will request the new file. This is generally known as _cachebusting_.
 
 The most effective technique is to insert a hash of the content into the name, usually at the end. For example a CSS file +global.css+ is hashed and the filename is updated to incorporate the hash.
 
@@ -62,17 +60,20 @@ Rails old strategy was to append a query string to every asset linked with a bui
 
 This has several disadvantages:
 
-1. Not all caches will cache content with a query string
-
-"Steve Souders recommends":http://www.stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring/, "...avoiding a querystring for cacheable resources". He found that in these case 5-20% of requests will not be cached.
-
-2. The filename can change between nodes in multi-server environments.
-
-The query string in Rails is based on the files mtime (mtime is the file modification time). When assets are deployed to a cluster, there is no guarantee that the timestamps will be the same, resulting in different values being used depending on which server handles the request.
+<ol>
+  <li>
+    <strong>Not all caches will cache content with a query string</strong><br>
+    "Steve Souders recommends":http://www.stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring/, "...avoiding a querystring for cacheable resources". He found that in these case 5-20% of requests will not be cached.
+  </li>
+  <li>
+    <strong>The file name can change between nodes in multi-server environments.</strong><br>
+    The query string in Rails is based on the modification time of the files. When assets are deployed to a cluster, there is no guarantee that the timestamps will be the same, resulting in different values being used depending on which server handles the request.
+  </li>
+</ol>
 
-The other problems is that when static assets are deployed with each new release of code, the mtime of *all* these files changes, forcing all remote clients to fetch them again, even when the content of those assets has not changed.
+The other problem is that when static assets are deployed with each new release of code, the mtime of *all* these files changes, forcing all remote clients to fetch them again, even when the content of those assets has not changed.
 
-Fingerprinting avoids all these problems be ensuring filenames are consistent based on the content.
+Fingerprinting avoids all these problems by ensuring filenames are consistent based on the content.
 
 More reading:
 
@@ -84,7 +85,7 @@ h3. How to Use the Asset Pipeline
 
 In previous versions of Rails, all assets were located in subdirectories of +public+ such as +images+, +javascripts+ and +stylesheets+. With the asset pipeline, the preferred location for these assets is now the +app/assets+ directory. Files in this directory will be served by the Sprockets middleware included in the sprockets gem.
 
-This is not to say that assets can (or should) no longer be placed in +public+. They still can be and will be served as static files by the application or web server. You would only use +app/assets+ if you wish your files to undergo some pre-processing before they are served.
+This is not to say that assets can (or should) no longer be placed in +public+; they still can be and will be served as static files by the application or web server. You would only use +app/assets+ if you wish your files to undergo some pre-processing before they are served.
 
 When a scaffold or controller is generated for the application, Rails will also generate a JavaScript file (or CoffeeScript if the +coffee-script+ gem is in the +Gemfile+) and a Cascading Style Sheet file (or SCSS if +sass-rails+ is in the +Gemfile+) file for that controller.
 
@@ -100,32 +101,72 @@ Assets can be placed inside an application in one of three locations: +app/asset
 
 +vendor/assets+ is for assets that are owned by outside entities, such as code for JavaScript plugins.
 
-All subdirectories that exists within these three locations will be added to the search path for Sprockets (visible by calling +Rails.application.config.assets.paths+ in a console). When an asset is requested, these paths will be looked through to see if they contain an asset matching the name specified. Once an asset has been found, it's processed by Sprockets and served.
+All subdirectories that exist within these three locations will be added to the search path for Sprockets (visible by calling +Rails.application.config.assets.paths+ in a console). When an asset is requested, these paths will be looked through to see if they contain an asset matching the name specified. Once an asset has been found, it's processed by Sprockets and served.
 
-h4. Coding links to Assets
+h4. Coding Links to Assets
 
 To access assets, we can use the same tags that we are generally familiar with:
 
+Sprockets does not add any new methods to require your assets, we still use the familiar +javascript_include_tag+ and +stylesheet_link_tag+.
+
 <erb>
-  <%= image_tag "rails.png" %>
+<%= stylesheet_link_tag "application" %>
+<%= javascript_include_tag "application" %>
 </erb>
 
-Providing that assets are enabled within our application (+config.assets.enabled+ in the current environment's file is not set to +false+), this file will be served by Sprockets unless a file at +public/assets/rails.png+ exists, in which case that file will be served. Alternatively, a file with an MD5 hash after its name such as +public/assets/rails-af27b6a414e6da00003503148be9b409.png+ will also be picked up by Sprockets. How these hashes are generated is covered in the "Production Assets":#production_assets section later on in this guide.
+In regular views you can access images in the +assets/images+ directory like this:
 
-Otherwise, Sprockets will look through the available paths until it finds a file that matches the name and then will serve it, first looking in the application's assets directories and then falling back to the various engines of the application.
+<erb>
+<%= image_tag "rails.png" %>
+</erb>
 
-Sprockets does not add any new methods to require your assets, we still use the familiar +javascript_include_tag+ and +stylesheet_link_tag+.
+Images can be organized into directories if required, and they can be accessed by specifying the directory's name in the tag:
 
 <erb>
-  <%= stylesheet_link_tag "application" %>
-  <%= javascript_include_tag "application" %>
+<%= image_tag "icons/rails.png" %>
 </erb>
 
-These helpers (when the pipeline is on) are providing links to the compiled manifest with the specified name (or names).
+Providing that assets are enabled within our application (+config.assets.enabled+ in the current environment's file is not set to +false+), this file will be served by Sprockets unless a file at +public/assets/rails.png+ exists, in which case that file will be served.
+
+Alternatively, a file with an MD5 hash after its name such as +public/assets/rails-af27b6a414e6da00003503148be9b409.png+ will also be picked up by Sprockets. How these hashes are generated is covered in the "Production Assets":#production_assets section later on in this guide.
+
+Otherwise, Sprockets will look through the available paths until it finds a file that matches the name and then will serve it, first looking in the application's assets directories and then falling back to the various engines of the application.
+
+If you want to use a "css data URI":http://en.wikipedia.org/wiki/Data_URI_scheme - a method of embedding the image data directly into the CSS file - you can use the +asset_data_uri+ helper.
+
+<plain>
+#logo { background: url(<%= asset_data_uri 'logo.png' %>)
+</plain>
+
+This will insert a correctly formatted data URI into the CSS source.
+
+h5. CSS and ERB
+
+If you add an +erb+ extension to a CSS asset, making it something such as +application.css.erb+ then you can use the +asset_path+ helper in your CSS rules:
+
+<plain>
+.class{background-image:<%= asset_path 'image.png' %>}
+</plain>
+
+This will write the path to the particular asset being referenced. In this example, it would make sense to have an image in one of the asset load paths, such as +app/assets/images/image.png+, which would be referenced here. If this image is already available in +public/assets+ as a fingerprinted file then that path will be referenced.
+
+Note that the closing tag cannot be of the style +-%>+.
+
+h5. CSS and SCSS
+
+When using the asset pipeline, paths to assets must be re-written and +sass-rails+ provides +_url+ and +_path+ helpers for the following asset classes: image, font, video, audio, javascript, stylesheet.
+
+* +image_url("rails.png")+ becomes +url(/assets/rails.png)+
+* +image_path("rails.png")+ becomes +"/assets/rails.png"+.
+
+The more generic form can also be used but the asset path and class must both be specified:
+
+* +asset_url("rails.png", "image")+ becomes +url(/assets/rails.png)+
+* +asset_path("rails.png", "image")+ becomes +"/assets/rails.png"+
 
 h4. Manifest Files and Directives
 
-Sprockets uses manifest files to determine which assets to include and serve. These manifest files contain _directives_ -  instructions that tell Sprockets which files to require in order to build a single CSS or JavaScript file. With these directives, Sprockets will load the files specified, process them if necessary, concatenate them into one single file and then compress them (if +Rails.application.config.assets.compress+ is set to +true+). By serving one file rather than many, a page's load time is greatly reduced.
+Sprockets uses manifest files to determine which assets to include and serve. These manifest files contain _directives_ - instructions that tell Sprockets which files to require in order to build a single CSS or JavaScript file. With these directives, Sprockets will load the files specified, process them if necessary, concatenate them into one single file and then compress them (if +Rails.application.config.assets.compress+ is set to +true+). By serving one file rather than many, a page's load time is greatly reduced as there is not as many requests to make for each file.
 
 For example, in the default Rails application there's a +app/assets/javascripts/application.js+ file which contains the following lines:
 
@@ -167,19 +208,17 @@ For some assets (like CSS) the compiled order is important. You can specify indi
 
 h4. Preprocessing
 
-The file extensions used on an asset will determine what preprocssing will be applied. When a controller or a scaffold is generated with the default Rails gemset, a CoffeeScript file and a SCSS file will be generated in place of a regular JavaScript and CSS file. The example used before was a controller called "projects", which generated an +app/assets/javascripts/projects.js.coffee+ and a +app/assets/stylesheets/projects.css.scss+ file.
+The file extensions used on an asset will determine what preprocessing will be applied. When a controller or a scaffold is generated with the default Rails gemset, a CoffeeScript file and a SCSS file will be generated in place of a regular JavaScript and CSS file. The example used before was a controller called "projects", which generated an +app/assets/javascripts/projects.js.coffee+ and a +app/assets/stylesheets/projects.css.scss+ file.
 
 When these files are requested, they will be processed by the processors provided by the +coffee-script+ and +sass-rails+ gems and then sent back to the browser as JavaScript and CSS respectively.
 
-Additional layers of pre-processing can be requested by adding other extensions. These should be used in the order the processing should be applied. For example, a stylesheet called +app/assets/stylesheets/projects.css.scss.erb+ would first be processed as ERB, then SCSS and finally served as CSS. The same applies to a JavaScript file - +app/assets/javascripts/projects.js.coffee.erb+ would be process as ERB, CoffeeScript and served as JavaScript.
+Additional layers of pre-processing can be requested by adding other extensions, where each extension will be processed in a right-to-left manner. These should be used in the order the processing should be applied. For example, a stylesheet called +app/assets/stylesheets/projects.css.scss.erb+ would first be processed as ERB, then SCSS and finally served as CSS. The same applies to a JavaScript file - +app/assets/javascripts/projects.js.coffee.erb+ would be process as ERB, CoffeeScript and served as JavaScript.
 
 Keep in mind that the order of these pre-processors is important. For example, if we called our JavaScript file +app/assets/javascripts/projects.js.erb.coffee+ then it would be processed with the CoffeeScript interpreter first, which wouldn't understand ERB and therefore we would run into problems.
 
 h3. In Development
 
-TODO: Talk about: Rack::Cache's caching (used in dev and production. The only difference is hashing and headers).
-
-In the development environment assets are compiled and cached on the first request after the server is started. Sprockets sets a +must-validate+ cache-control http header to reduce request overhead on subsequent requests - on these the browser gets a 304 (not-modified) response.
+In the development environment assets are compiled and cached on the first request after the server is started. Sprockets sets a +must-validate+ Cache-Control HTTP header to reduce request overhead on subsequent requests - on these the browser gets a 304 (not-modified) response.
 
 If any of the files in the manifest have changed between requests, the server will respond with a new compiled file.
 
@@ -195,15 +234,15 @@ You can put +?debug_assets=true+ or +?debug_assets=1+ at the end of a URL and Sp
 By default, this would only render this line when used with +<%= javascript_include_tag "application" %>+ in a view or layout:
 
 <html>
-  <script src='/assets/application.js'></script>
+<script src='/assets/application.js'></script>
 </html>
 
 When the +debug_assets+ parameter is set, this line will be expanded out into three separate lines, separating out the combined file into their parts.
 
 <html>
-  <script src='/assets/application.js'></script>
-  <script src='/assets/projects.js'></script>
-  <script src='/assets/tickets.js'></script>
+<script src='/assets/application.js'></script>
+<script src='/assets/projects.js'></script>
+<script src='/assets/tickets.js'></script>
 </html>
 
 This allows the individual parts of an asset to be rendered and debugged separately.
@@ -219,80 +258,105 @@ On the first request the assets are compiled and cached as described above, howe
 /assets/application-4dd5b109ee3439da54f5bdfd78a80473.css
 </plain>
 
-The MD5 is generated from the contents of the compiled files, and is included in the http +Content-MD5+ header.
+The MD5 is generated from the contents of the compiled files, and is included in the HTTP +Content-MD5+ header.
 
-Sprockets also sets the +Cache-Control+ http header to +max-age=31536000+. This signals all caches between your server and the client browser that this content (the file served) can be cached for 1 year. The effect of this is to reduce the number of requests for this asset from your server; the asset has a good chance of being in the local browser cache or some intermediate cache.
+Sprockets also sets the +Cache-Control+ HTTP header to +max-age=31536000+. This signals all caches between your server and the client browser that this content (the file served) can be cached for 1 year. The effect of this is to reduce the number of requests for this asset from your server; the asset has a good chance of being in the local browser cache or some intermediate cache.
 
 This behavior is controlled by the setting of +config.action_controller.perform_caching+ setting in Rails (which is +true+ for production, +false+ for everything else). This value is propagated to Sprockets during initialization for use when action_controller is not available.
 
-TODO:
-describe each and the differences between:
-  * Sass-rails's handy +image_url+ helpers
-  * ERB pre-processing and +asset_path+
-
-h4. Precompiling assets
+h4. Precompiling Assets
 
 Even though assets are served by Rack::Cache with far-future headers, in high traffic sites this may not be fast enough.
 
 Rails comes bundled with a rake task to compile the manifests to files on disc. These are located in the +public/assets+ directory where they will be served by your web server instead of the Rails application.
 
-TODO: Add section about image assets
-
 The rake task is:
 
-<erb>
+<plain>
 rake assets:precompile
+</plain>
+
+You can run this as part of a Capistrano deployment:
+
+<erb>
+before 'deploy:symlink' do
+  run "cd #{release_path}; RAILS_ENV=#{rails_env} rake assets:precompile"
+end
 </erb>
 
-TODO: explain where to use this with Capistrano
+If you are not precompiling your assets, and you are using the default cache file store (which is the file system), you will need to symlink +rails_root/tmp/cache/assets+ from the shared folder that is part of the Capistrano deployment structure in order to persist the cached file between deployments.
 
-TODO: talk about the +config.assets.precompile+ option and the default matcher for files:
+TODO: Extend above task to allow for this and add task to set it up (See commits 8f0e0b6 and 704ee0df). Note: Capistrano folks are working on a recipe - update this when it available (see https://github.com/capistrano/capistrano/pull/35).
+
+The default matcher for compiling files will include +application.js+, +application.css+ and all files that do not end in +js+ or +css+:
+
+<ruby>
+[ /\w+\.(?!js|css).+/, /application.(css|js)$/ ]
+</ruby>
+
+If you have other manifests or individual stylesheets and JavaScript files to include, you can append them to the +precompile+ array:
 
 <erb>
-[ /\w+\.(?!js|css).+/, "application.js", "application.css" ]
+config.assets.precompile << ['admin.js', 'admin.css', 'swfObject.js']
 </erb>
 
+Precompiled assets exist on the filesystem and are served directly by your webserver. They do not have far-future headers by default, so to get the benefit of fingerprinting you'll have to update your server configuration to add them.
+
+For Apache:
+
+<plain>
+<LocationMatch "^/assets/.*$">
+  # Some browsers still send conditional-GET requests if there's a
+  # Last-Modified header or an ETag header even if they haven't
+  # reached the expiry date sent in the Expires header.
+  Header unset Last-Modified
+  Header unset ETag
+  FileETag None
+  # RFC says only cache for 1 year
+  ExpiresActive On
+  ExpiresDefault "access plus 1 year"
+</LocationMatch>
+</plain>
+
+TODO: NGINX instructions
 
-Sprockets also creates a "gzip":http://en.wikipedia.org/wiki/Gzip (.gz) of your assets. This prevents your server from contently compressing your assets for each request. You must configure your server to use gzip compression and serve the compressed assets that will be stored in the public/assets folder. The following are some configuration blocks that you can use for common servers.
-NGINX & Apache examples?
+When files are precompiled Sprockets also creates "Gzip":http://en.wikipedia.org/wiki/Gzip (.gz) version of your assets. This avoids the server having to do this for any requests; it can simply read the compressed files from disc. You must configure your server to use gzip compression and serve the compressed assets that will be stored in the public/assets folder. The following configuration options can be used:
 
+TODO: Apache instructions
 
 
-h3. Customizing The Pipeline
+h3. Customizing the Pipeline
 
-h4. CSS
 
-There is currently one option for processing CSS - SCSS. This Gem extends the CSS syntax and offers minification.
+h4. CSS Compression
 
-The following line will enable SCSS in you project.
+There is currently one option for compressing CSS - YUI. This Gem extends the CSS syntax and offers minification.
+
+The following line will enable YUI compression, and requires the +yui-compressor+ gem.
 
 <erb>
-config.assets.css_compressor = :scss
+config.assets.css_compressor = :yui
 </erb>
 
-This option is for compression only and does not relate to the SCSS language extensions that apply when using the +.scss+ file extension on CSS assets.
-
-h4. Javascript
+The +config.assets.compress+ must be set to +true+ to enable CSS compression
 
-There are three options available to process javascript - uglifier, closure and yui.
+h4. JavaScript
 
-The default Gemfile includes "uglifier":https://github.com/lautis/uglifier. This gem wraps "UglifierJS":https://github.com/mishoo/UglifyJS (written for NodeJS) in Ruby. It compress your code by removing white spaces and other magical things like changing your if and else statements to ternary operators when possible.
+Possible options for JavaScript compression are +:closure+, +:uglifier+ and +:yui+. These require the use of the +closure-compiler+, +uglifier+ or +yui-compressor+ gems respectively.
 
-TODO: Add detail about the other two
+The default Gemfile includes "uglifier":https://github.com/lautis/uglifier. This gem wraps "UglifierJS":https://github.com/mishoo/UglifyJS (written for NodeJS) in Ruby. It compress your code by removing white spaces and other magical things like changing your +if+ and +else+ statements to ternary operators where possible.
 
-The following line will invoke uglifier for Javascript compression.
+The following line will invoke uglifier for JavaScript compression.
 
 <erb>
 config.assets.js_compressor  = :uglifier
 </erb>
 
+The +config.assets.compress+ must be set to +true+ to enable JavaScript compression
 
+h4. Using Your Own Compressor
 
-h4. Using your own compressor
-
-The compressor config settings for CSS and Javascript will also take an Object.
-
-This object must have a +compress+ method that takes a string as the sole argument and it must return a string.
+The compressor config settings for CSS and JavaScript will also take any Object. This object must have a +compress+ method that takes a string as the sole argument and it must return a string.
 
 <erb>
 class Transformer
@@ -309,7 +373,7 @@ config.assets.css_compressor = Transformer.new
 </erb>
 
 
-h4. Changing the _assets_ path
+h4. Changing the _assets_ Path
 
 The public path that Sprockets uses by default is +/assets+.
 
@@ -319,8 +383,27 @@ This can be changed to something else:
 config.assets.prefix = "/some_other_path"
 </erb>
 
-This is a handy option if you have any existing project (pre Rails 3.1) that already uses this path.
+This is a handy option if you have any existing project (pre Rails 3.1) that already uses this path or you wish to use this path for a new resource.
 
+h4. X-Sendfile Headers
+
+The X-Sendfile header is a directive to the server to ignore the response from the application, and instead serve the file specified in the headers. In production Rails (via Sprockets) does not send the asset - just the location and a zero-length response - relying on the web server to do the file serving, which is usually faster. Both Apache and nginx support this option.
+
+The configuration is available in <tt>config/environments/production.rb</tt>.
+
+<erb>
+config.action_dispatch.x_sendfile_header = "X-Sendfile" # Use 'X-Accel-Redirect' for nginx
+</erb>
+
+You should check that your server or hosting service actually supports this, otherwise comment it out.
+
+WARNING: If you are upgrading an existing application and intend to use this option, take care to paste this configuration option only into +production.rb+ (and not +application.rb+) and any other environment you define with production behaviour.
+
+h3. How Caching Works
+
+Sprockets uses the default rails cache store to cache assets in dev and production. The only difference is file names are fingerprinted and get far-future headers in production.
+
+TODO: Add more about changing the default store.
 
 h3. Adding Assets to Your Gems
 
@@ -330,6 +413,4 @@ A good example of this is the +jquery-rails+ gem which comes with Rails as the s
 
 h3. Making Your Library or Gem a Pre-Processor
 
-"You should be able to register [your gems] on Tilt and Sprockets will find them." - Josh
-Tilt: https://github.com/rtomayko/tilt
-
+TODO: Registering gems on "Tilt":https://github.com/rtomayko/tilt enabling Sprockets to find them.
diff --git a/railties/guides/source/caching_with_rails.textile b/railties/guides/source/caching_with_rails.textile
index 252003edd0..ae56911441 100644
--- a/railties/guides/source/caching_with_rails.textile
+++ b/railties/guides/source/caching_with_rails.textile
@@ -15,7 +15,7 @@ h3. Basic Caching
 
 This is an introduction to the three types of caching techniques that Rails provides by default without the use of any third party plugins.
 
-To start playing with testing you'll want to ensure that +config.action_controller.perform_caching+ is set to +true+ if you're running in development mode. This flag is normally set in the corresponding +config/environments/*.rb+ and caching is disabled by default for development and test, and enabled for production.
+To start playing with caching you'll want to ensure that +config.action_controller.perform_caching+ is set to +true+, if you're running in development mode. This flag is normally set in the corresponding +config/environments/*.rb+ and caching is disabled by default for development and test, and enabled for production.
 
 <ruby>
 config.action_controller.perform_caching = true
@@ -23,9 +23,9 @@ config.action_controller.perform_caching = true
 
 h4. Page Caching
 
-Page caching is a Rails mechanism which allows the request for a generated page to be fulfilled by the webserver (i.e. apache or nginx), without ever having to go through the Rails stack at all. Obviously, this is super-fast. Unfortunately, it can't be applied to every situation (such as pages that need authentication) and since the webserver is literally just serving a file from the filesystem, cache expiration is an issue that needs to be dealt with.
+Page caching is a Rails mechanism which allows the request for a generated page to be fulfilled by the webserver (i.e. Apache or nginx), without ever having to go through the Rails stack at all. Obviously, this is super-fast. Unfortunately, it can't be applied to every situation (such as pages that need authentication) and since the webserver is literally just serving a file from the filesystem, cache expiration is an issue that needs to be dealt with.
 
-So, how do you enable this super-fast cache behavior? Simple, let's say you have a controller called +ProductsController+ and an +index+ action that lists all the products
+To enable page caching, you need to use the +caches_page+ method.
 
 <ruby>
 class ProductsController < ActionController
@@ -35,11 +35,10 @@ class ProductsController < ActionController
   def index
     @products = Products.all
   end
-
 end
 </ruby>
 
-The first time anyone requests +/products+, Rails will generate a file called +products.html+ and the webserver will then look for that file before it passes the next request for +/products+ to your Rails application.
+Let's say you have a controller called +ProductsController+ and an +index+ action that lists all the products. The first time anyone requests +/products+, Rails will generate a file called +products.html+ and the webserver will then look for that file before it passes the next request for +/products+ to your Rails application.
 
 By default, the page cache directory is set to +Rails.public_path+ (which is usually set to the +public+ folder) and this can be configured by changing the configuration setting +config.action_controller.page_cache_directory+. Changing the default from +public+ helps avoid naming conflicts, since you may want to put other static html in +public+, but changing this will require web server reconfiguration to let the web server know where to serve the cached files from.
 
@@ -104,7 +103,7 @@ INFO: Action caching runs in an after filter. Thus, invalid requests won't gener
 
 h4. Fragment Caching
 
-Life would be perfect if we could get away with caching the entire contents of a page or action and serving it out to the world. Unfortunately, dynamic web applications usually build pages with a variety of components not all of which have the same caching characteristics. In order to address such a dynamically created page where different parts of the page need to be cached and expired differently Rails provides a mechanism called Fragment Caching.
+Life would be perfect if we could get away with caching the entire contents of a page or action and serving it out to the world. Unfortunately, dynamic web applications usually build pages with a variety of components not all of which have the same caching characteristics. In order to address such a dynamically created page where different parts of the page need to be cached and expired differently, Rails provides a mechanism called Fragment Caching.
 
 Fragment Caching allows a fragment of view logic to be wrapped in a cache block and served out of the cache store when the next request comes in.
 
@@ -416,3 +415,4 @@ h3. Changelog
 * December  27, 2008: Typo fixes
 * November  23, 2008: Incremental updates with various suggested changes and formatting cleanup
 * September 15, 2008: Initial version by Aditya Chadha
+
diff --git a/railties/guides/source/command_line.textile b/railties/guides/source/command_line.textile
index 9e3b25d794..b34506d4d8 100644
--- a/railties/guides/source/command_line.textile
+++ b/railties/guides/source/command_line.textile
@@ -85,6 +85,8 @@ h4. +rails generate+
 
 The +rails generate+ command uses templates to create a whole lot of things. Running +rails generate+ by itself gives a list of available generators:
 
+You can also use the alias "g" to invoke the generator command: <tt>rails g</tt>.
+
 <shell>
 $ rails generate
 Usage: rails generate GENERATOR [args] [options]
@@ -311,6 +313,8 @@ h4. +rails runner+
 $ rails runner "Model.long_running_method"
 </shell>
 
+You can also use the alias "r" to invoke the runner: <tt>rails r</tt>.
+
 You can specify the environment in which the +runner+ command should operate using the +-e+ switch.
 
 <shell>
diff --git a/railties/guides/source/configuring.textile b/railties/guides/source/configuring.textile
index 8e6010ff79..7ed958be08 100644
--- a/railties/guides/source/configuring.textile
+++ b/railties/guides/source/configuring.textile
@@ -120,10 +120,12 @@ h4. Configuring Assets
 
 Rails 3.1, by default, is set up to use the +sprockets+ gem to manage assets within an application. This gem concatenates and compresses assets in order to make serving them much less painful.
 
-* +config.assets.css_compressor+ defines the CSS compressor to use. Only supported value at the moment is +:yui+, which uses the +yui-compressor+ gem.
-
 * +config.assets.enabled+ a flag that controls whether the asset pipeline is enabled. It is explicitly initialized in +config/application.rb+.
 
+* +config.assets.compress+ a flag that enables the compression of compiled assets. It is explicitly set to true in +config/production.rb+.
+
+* +config.assets.css_compressor+ defines the CSS compressor to use. Only supported value at the moment is +:yui+, which uses the +yui-compressor+ gem.
+
 * +config.assets.js_compressor+ defines the JavaScript compressor to use. Possible values are +:closure+, +:uglifier+ and +:yui+ which require the use of the +closure-compiler+, +uglifier+ or +yui-compressor+ gems respectively.
 
 * +config.assets.paths+ contains the paths which are used to look for assets. Appending paths to this configuration option will cause those paths to be used in the search for assets.
diff --git a/railties/guides/source/form_helpers.textile b/railties/guides/source/form_helpers.textile
index 9051ede9dd..96a52af612 100644
--- a/railties/guides/source/form_helpers.textile
+++ b/railties/guides/source/form_helpers.textile
@@ -170,27 +170,34 @@ IMPORTANT: Always use labels for each checkbox and radio button. They associate
 
 h4. Other Helpers of Interest
 
-Other form controls worth mentioning are the text area, password input and hidden input:
+Other form controls worth mentioning are the text area, password input, hidden input, search input, tel input, url input and email input:
 
 <erb>
 <%= text_area_tag(:message, "Hi, nice site", :size => "24x6") %>
 <%= password_field_tag(:password) %>
 <%= hidden_field_tag(:parent_id, "5") %>
+<%= search_field(:user, :name) %>
+<%= telephone_field(:user, :phone) %>
+<%= url_field(:user, :homepage) %>
+<%= email_field(:user, :address) %>
 </erb>
 
-output:
+Output:
 
 <html>
 <textarea id="message" name="message" cols="24" rows="6">Hi, nice site</textarea>
 <input id="password" name="password" type="password" />
 <input id="parent_id" name="parent_id" type="hidden" value="5" />
+<input id="user_name" name="user[name]" size="30" type="search" />
+<input id="user_phone" name="user[phone]" size="30" type="tel" />
+<input id="user_homepage" size="30" name="user[homepage]" type="url" />
+<input id="user_address" size="30" name="user[address]" type="email" />
 </html>
 
-Hidden inputs are not shown to the user, but they hold data like any textual input. Values inside them can be changed with JavaScript.
+Hidden inputs are not shown to the user, but they hold data like any textual input. Values inside them can be changed with JavaScript. The search, tel, url and email inputs are specified in HTML5 and may receive special handling and/or formatting in some user-agents.
 
 TIP: If you're using password input fields (for any purpose), you might want to configure your application to prevent those parameters from being logged.
 
-
 h3. Dealing with Model Objects
 
 h4. Model Object Helpers
diff --git a/railties/guides/source/migrations.textile b/railties/guides/source/migrations.textile
index dbbf8f3b51..c88e3cc338 100644
--- a/railties/guides/source/migrations.textile
+++ b/railties/guides/source/migrations.textile
@@ -17,7 +17,7 @@ endprologue.
 
 h3. Anatomy of a Migration
 
-Before I dive into the details of a migration, here are a few examples of the sorts of things you can do:
+Before we dive into the details of a migration, here are a few examples of the sorts of things you can do:
 
 <ruby>
 class CreateProducts < ActiveRecord::Migration
@@ -117,6 +117,33 @@ Occasionally you will make a mistake when writing a migration. If you have alrea
 
 In general editing existing migrations is not a good idea: you will be creating extra work for yourself and your co-workers and cause major headaches if the existing version of the migration has already been run on production machines. Instead you should write a new migration that performs the changes you require. Editing a freshly generated migration that has not yet been committed to source control (or more generally which has not been propagated beyond your development machine) is relatively harmless.
 
+h4. Supported Types
+
+Active Record supports the following types:
+
+* +:primary_key+
+* +:string+
+* +:text+
+* +:integer+
+* +:float+
+* +:decimal+
+* +:datetime+
+* +:timestamp+
+* +:time+
+* +:date+
+* +:binary+
+* +:boolean+
+
+These will be mapped onto an appropriate underlying database type, for example with MySQL +:string+ is mapped to +VARCHAR(255)+. You can create columns of types not supported by Active Record when using the non-sexy syntax, for example
+
+<ruby>
+create_table :products do |t|
+  t.column :name, 'polygon', :null => false
+end
+</ruby>
+
+This may however hinder portability to other databases.
+
 h3. Creating a Migration
 
 h4. Creating a Model
@@ -261,18 +288,6 @@ end
 
 will append +ENGINE=BLACKHOLE+ to the SQL statement used to create the table (when using MySQL the default is +ENGINE=InnoDB+).
 
-The types supported by Active Record are +:primary_key+, +:string+, +:text+, +:integer+, +:float+, +:decimal+, +:datetime+, +:timestamp+, +:time+, +:date+, +:binary+, +:boolean+.
-
-These will be mapped onto an appropriate underlying database type, for example with MySQL +:string+ is mapped to +VARCHAR(255)+. You can create columns of types not supported by Active Record when using the non-sexy syntax, for example
-
-<ruby>
-create_table :products do |t|
-  t.column :name, 'polygon', :null => false
-end
-</ruby>
-
-This may however hinder portability to other databases.
-
 h4. Changing Tables
 
 A close cousin of +create_table+ is +change_table+, used for changing existing tables. It is used in a similar fashion to +create_table+ but the object yielded to the block knows more tricks. For example
diff --git a/railties/guides/source/plugins.textile b/railties/guides/source/plugins.textile
index 79bbe495bd..188423861d 100644
--- a/railties/guides/source/plugins.textile
+++ b/railties/guides/source/plugins.textile
@@ -86,7 +86,7 @@ class CoreExtTest < Test::Unit::TestCase
 end
 </ruby>
 
-Run +rake+ to run the test. This test should fail because we haven't implemented the +to_squak+ method:
+Run +rake+ to run the test. This test should fail because we haven't implemented the +to_squawk+ method:
 
 <shell>
 	  1) Error:
@@ -218,8 +218,8 @@ test/dummy directory:
 
 <shell>
 $ cd test/dummy
-$ rails generate model Hickwall last_squak:string
-$ rails generate model Wickwall last_squak:string last_tweet:string
+$ rails generate model Hickwall last_squawk:string
+$ rails generate model Wickwall last_squawk:string last_tweet:string
 </shell>
 
 Now you can create the necessary database tables in your testing database by navigating to your dummy app
diff --git a/railties/guides/source/rails_application_templates.textile b/railties/guides/source/rails_application_templates.textile
index 3db47a70e8..90fc763349 100644
--- a/railties/guides/source/rails_application_templates.textile
+++ b/railties/guides/source/rails_application_templates.textile
@@ -11,22 +11,18 @@ endprologue.
 
 h3. Usage
 
-To apply a template, you need to provide the Rails generator with the location of the template you wish to apply, using -m option:
+To apply a template, you need to provide the Rails generator with the location of the template you wish to apply, using -m option. This can either be path to a file or a URL.
 
 <shell>
 $ rails new blog -m ~/template.rb
+$ rails new blog -m http://example.com/template.rb
 </shell>
 
-It's also possible to apply a template using a URL:
-
-<shell>
-$ rails new blog -m https://gist.github.com/755496.txt
-</shell>
-
-Alternatively, you can use the rake task +rails:template+ to apply a template to an existing Rails application:
+You can use the rake task +rails:template+ to apply templates to an existing Rails application. The location of the template needs to be passed in to an environment variable named LOCATION. Again, this can either be path to a file or a URL.
 
 <shell>
 $ rake rails:template LOCATION=~/template.rb
+$ rake rails:template LOCATION=http://example.com/template.rb
 </shell>
 
 h3. Template API
diff --git a/railties/guides/source/routing.textile b/railties/guides/source/routing.textile
index 6a729d9641..68fb22f5d8 100644
--- a/railties/guides/source/routing.textile
+++ b/railties/guides/source/routing.textile
@@ -68,7 +68,7 @@ Rails would dispatch that request to the +destroy+ method on the +photos+ contro
 
 h4. CRUD, Verbs, and Actions
 
-In Rails, a resourceful route provides a mapping between HTTP verbs and URLs and controller actions. By convention, each action also maps to particular CRUD operations in a database. A single entry in the routing file, such as
+In Rails, a resourceful route provides a mapping between HTTP verbs and URLs to controller actions. By convention, each action also maps to particular CRUD operations in a database. A single entry in the routing file, such as
 
 <ruby>
 resources :photos
@@ -94,8 +94,8 @@ Creating a resourceful route will also expose a number of helpers to the control
 
 * +photos_path+ returns +/photos+
 * +new_photo_path+ returns +/photos/new+
-* +edit_photo_path(id)+ returns +/photos/:id/edit+ (for instance, +edit_photo_path(10)+ returns +/photos/10/edit+)
-* +photo_path(id)+ returns +/photos/:id+ (for instance, +photo_path(10)+ returns +/photos/10+)
+* +edit_photo_path(:id)+ returns +/photos/:id/edit+ (for instance, +edit_photo_path(10)+ returns +/photos/10/edit+)
+* +photo_path(:id)+ returns +/photos/:id+ (for instance, +photo_path(10)+ returns +/photos/10+)
 
 Each of these helpers has a corresponding +_url+ helper (such as +photos_url+) which returns the same path prefixed with the current host, port and path prefix.
 
@@ -163,14 +163,14 @@ end
 
 This will create a number of routes for each of the +posts+ and +comments+ controller. For +Admin::PostsController+, Rails will create:
 
-|_.HTTP Verb |_.Path              |_.action |_.named helper            |
-|GET         |/admin/posts        |index    | admin_posts_path         |
-|GET         |/admin/posts/new    |new      | new_admin_posts_path     |
-|POST        |/admin/posts        |create   | admin_posts_path         |
-|GET         |/admin/posts/1      |show     | admin_post_path(id)      |
-|GET         |/admin/posts/1/edit |edit     | edit_admin_post_path(id) |
-|PUT         |/admin/posts/1      |update   | admin_post_path(id)      |
-|DELETE      |/admin/posts/1      |destroy  | admin_post_path(id)      |
+|_.HTTP Verb |_.Path                |_.action |_.named helper             |
+|GET         |/admin/posts          |index    | admin_posts_path          |
+|GET         |/admin/posts/new      |new      | new_admin_post_path       |
+|POST        |/admin/posts          |create   | admin_posts_path          |
+|GET         |/admin/posts/:id      |show     | admin_post_path(:id)      |
+|GET         |/admin/posts/:id/edit |edit     | edit_admin_post_path(:id) |
+|PUT         |/admin/posts/:id      |update   | admin_post_path(:id)      |
+|DELETE      |/admin/posts/:id      |destroy  | admin_post_path(:id)      |
 
 If you want to route +/posts+ (without the prefix +/admin+) to +Admin::PostsController+, you could use
 
@@ -204,12 +204,12 @@ In each of these cases, the named routes remain the same as if you did not use +
 
 |_.HTTP Verb |_.Path               |_.action |_.named helper      |
 |GET         |/admin/posts         |index    | posts_path         |
-|GET         |/admin/posts/new     |new      | posts_path         |
+|GET         |/admin/posts/new     |new      | new_post_path      |
 |POST        |/admin/posts         |create   | posts_path         |
-|GET         |/admin/posts/1       |show     | post_path(id)      |
-|GET         |/admin/posts/1/edit  |edit     | edit_post_path(id) |
-|PUT         |/admin/posts/1       |update   | post_path(id)      |
-|DELETE      |/admin/posts/1       |destroy  | post_path(id)      |
+|GET         |/admin/posts/:id     |show     | post_path(:id)     |
+|GET         |/admin/posts/:id/edit|edit     | edit_post_path(:id)|
+|PUT         |/admin/posts/:id     |update   | post_path(:id)     |
+|DELETE      |/admin/posts/:id     |destroy  | post_path(:id)     |
 
 h4. Nested Resources
 
@@ -236,13 +236,13 @@ end
 In addition to the routes for magazines, this declaration will also route ads to an +AdsController+. The ad URLs require a magazine:
 
 |_.HTTP Verb |_.Path                  |_.action |_.used for                                                                 |
-|GET         |/magazines/1/ads        |index    |display a list of all ads for a specific magazine                          |
-|GET         |/magazines/1/ads/new    |new      |return an HTML form for creating a new ad belonging to a specific magazine |
-|POST        |/magazines/1/ads        |create   |create a new ad belonging to a specific magazine                           |
-|GET         |/magazines/1/ads/1      |show     |display a specific ad belonging to a specific magazine                     |
-|GET         |/magazines/1/ads/1/edit |edit     |return an HTML form for editing an ad belonging to a specific magazine     |
-|PUT         |/magazines/1/ads/1      |update   |update a specific ad belonging to a specific magazine                      |
-|DELETE      |/magazines/1/ads/1      |destroy  |delete a specific ad belonging to a specific magazine                      |
+|GET         |/magazines/:id/ads        |index    |display a list of all ads for a specific magazine                          |
+|GET         |/magazines/:id/ads/new    |new      |return an HTML form for creating a new ad belonging to a specific magazine |
+|POST        |/magazines/:id/ads        |create   |create a new ad belonging to a specific magazine                           |
+|GET         |/magazines/:id/ads/:id      |show     |display a specific ad belonging to a specific magazine                     |
+|GET         |/magazines/:id/ads/:id/edit |edit     |return an HTML form for editing an ad belonging to a specific magazine     |
+|PUT         |/magazines/:id/ads/:id      |update   |update a specific ad belonging to a specific magazine                      |
+|DELETE      |/magazines/:id/ads/:id      |destroy  |delete a specific ad belonging to a specific magazine                      |
 
 
 This will also create routing helpers such as +magazine_ads_url+ and +edit_magazine_ad_path+. These helpers take an instance of Magazine as the first parameter (+magazine_ads_url(@magazine)+).
@@ -560,13 +560,13 @@ would match +zoo/woo/foo/bar/baz+ with +params[:a]+ equals +"zoo/woo"+, and +par
 NOTE: Starting from Rails 3.1, wildcard routes will always match the optional format segment by default. For example if you have this route:
 
 <ruby>
-map '*pages' => 'pages#show'
+match '*pages' => 'pages#show'
 </ruby>
 
 NOTE: By requesting +"/foo/bar.json"+, your +params[:pages]+ will be equals to +"foo/bar"+ with the request format of JSON. If you want the old 3.0.x behavior back, you could supply +:format => false+ like this:
 
 <ruby>
-map '*pages' => 'pages#show', :format => false
+match '*pages' => 'pages#show', :format => false
 </ruby>
 
 h4. Redirection
@@ -628,16 +628,16 @@ resources :photos, :controller => "images"
 
 will recognize incoming paths beginning with +/photos+ but route to the +Images+ controller:
 
-|_.HTTP Verb |_.Path         |_.action |_.named helper       |
-|GET         |/photos        |index    | photos_path         |
-|GET         |/photos/new    |new      | new_photo_path      |
-|POST        |/photos        |create   | photos_path         |
-|GET         |/photos/1      |show     | photo_path(id)      |
-|GET         |/photos/1/edit |edit     | edit_photo_path(id) |
-|PUT         |/photos/1      |update   | photo_path(id)      |
-|DELETE      |/photos/1      |destroy  | photo_path(id)      |
+|_.HTTP Verb |_.Path           |_.action |_.named helper        |
+|GET         |/photos          |index    | photos_path          |
+|GET         |/photos/new      |new      | new_photo_path       |
+|POST        |/photos          |create   | photos_path          |
+|GET         |/photos/:id      |show     | photo_path(:id)      |
+|GET         |/photos/:id/edit |edit     | edit_photo_path(:id) |
+|PUT         |/photos/:id      |update   | photo_path(:id)      |
+|DELETE      |/photos/:id      |destroy  | photo_path(:id)      |
 
-NOTE: Use +photos_path+, +new_photos_path+, etc. to generate paths for this resource.
+NOTE: Use +photos_path+, +new_photo_path+, etc. to generate paths for this resource.
 
 h4. Specifying Constraints
 
@@ -672,14 +672,14 @@ resources :photos, :as => "images"
 
 will recognize incoming paths beginning with +/photos+ and route the requests to +PhotosController+, but use the value of the :as option to name the helpers.
 
-|_.HTTP verb|_.Path          |_.action |_.named helper       |
-|GET        |/photos         |index    | images_path         |
-|GET        |/photos/new     |new      | new_image_path      |
-|POST       |/photos         |create   | images_path         |
-|GET        |/photos/1       |show     | image_path(id)      |
-|GET        |/photos/1/edit  |edit     | edit_image_path(id) |
-|PUT        |/photos/1       |update   | image_path(id)      |
-|DELETE     |/photos/1       |destroy  | image_path(id)      |
+|_.HTTP verb|_.Path            |_.action |_.named helper        |
+|GET        |/photos           |index    | images_path          |
+|GET        |/photos/new       |new      | new_image_path       |
+|POST       |/photos           |create   | images_path          |
+|GET        |/photos/:id       |show     | image_path(:id)      |
+|GET        |/photos/:id/edit  |edit     | edit_image_path(:id) |
+|PUT        |/photos/:id       |update   | image_path(:id)      |
+|DELETE     |/photos/:id       |destroy  | image_path(:id)      |
 
 h4. Overriding the +new+ and +edit+ Segments
 
@@ -776,14 +776,14 @@ end
 
 Rails now creates routes to the +CategoriesController+.
 
-|_.HTTP verb|_.Path                   |_.action |_.named helper          |
-|GET        |/kategorien              |index    | categories_path        |
-|GET        |/kategorien/neu          |new      | new_category_path      |
-|POST       |/kategorien              |create   | categories_path        |
-|GET        |/kategorien/1            |show     | category_path(id)      |
-|GET        |/kategorien/1/bearbeiten |edit     | edit_category_path(id) |
-|PUT        |/kategorien/1            |update   | category_path(id)      |
-|DELETE     |/kategorien/1            |destroy  | category_path(id)      |
+|_.HTTP verb|_.Path                     |_.action |_.named helper           |
+|GET        |/kategorien                |index    | categories_path         |
+|GET        |/kategorien/neu            |new      | new_category_path       |
+|POST       |/kategorien                |create   | categories_path         |
+|GET        |/kategorien/:id            |show     | category_path(:id)      |
+|GET        |/kategorien/:id/bearbeiten |edit     | edit_category_path(:id) |
+|PUT        |/kategorien/:id            |update   | category_path(:id)      |
+|DELETE     |/kategorien/:id            |destroy  | category_path(:id)      |
 
 h4. Overriding the Singular Form
 
diff --git a/railties/lib/rails/application.rb b/railties/lib/rails/application.rb
index 559739b2ec..9e2f1a4b7a 100644
--- a/railties/lib/rails/application.rb
+++ b/railties/lib/rails/application.rb
@@ -11,7 +11,7 @@ module Rails
   # == Initialization
   #
   # Rails::Application is responsible for executing all railties, engines and plugin
-  # initializers. Besides, it also executed some bootstrap initializers (check
+  # initializers. It also executes some bootstrap initializers (check
   # Rails::Application::Bootstrap) and finishing initializers, after all the others
   # are executed (check Rails::Application::Finisher).
   #
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index eb6fcd5dd7..cb897e94d7 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -5,13 +5,14 @@ require 'rbconfig'
 require 'rails/engine/railties'
 
 module Rails
-  # Rails::Engine allows you to wrap a specific Rails application and share it across
-  # different applications. Since Rails 3.0, every <tt>Rails::Application</tt> is nothing
-  # more than an engine, allowing you to share it very easily.
+  # <tt>Rails::Engine</tt> allows you to wrap a specific Rails application or subset of
+  # functionality and share it with other applications. Since Rails 3.0, every
+  # <tt>Rails::Application</tt> is just an engine, which allows for simple
+  # feature and application sharing.
   #
-  # Any <tt>Rails::Engine</tt> is also a <tt>Rails::Railtie</tt>, so the same methods
-  # (like <tt>rake_tasks</tt> and +generators+) and configuration available in the
-  # latter can also be used in the former.
+  # Any <tt>Rails::Engine</tt> is also a <tt>Rails::Railtie</tt>, so the same
+  # methods (like <tt>rake_tasks</tt> and +generators+) and configuration
+  # options that are available in railties can also be used in engines.
   #
   # == Creating an Engine
   #
@@ -71,12 +72,13 @@ module Rails
   #
   # == Paths
   #
-  # Since Rails 3.0, both your application and engines do not have hardcoded paths.
-  # This means that you are not required to place your controllers at <tt>app/controllers</tt>,
-  # but in any place which you find convenient.
+  # Since Rails 3.0, applications and engines have more flexible path configuration (as
+  # opposed to the previous hardcoded path configuration). This means that you are not
+  # required to place your controllers at <tt>app/controllers</tt>, but in any place
+  # which you find convenient.
   #
   # For example, let's suppose you want to place your controllers in <tt>lib/controllers</tt>.
-  # All you would need to do is:
+  # You can set that as an option:
   #
   #   class MyEngine < Rails::Engine
   #     paths["app/controllers"] = "lib/controllers"
@@ -105,9 +107,9 @@ module Rails
   #     paths["config/routes"]       # => ["config/routes.rb"]
   #   end
   #
-  # Your <tt>Application</tt> class adds a couple more paths to this set. And as in your
-  # <tt>Application</tt>,all folders under +app+ are automatically added to the load path.
-  # So if you have <tt>app/observers</tt>, it's added by default.
+  # The <tt>Application</tt> class adds a couple more paths to this set. And as in your
+  # <tt>Application</tt>, all folders under +app+ are automatically added to the load path.
+  # If you have an <tt>app/observers</tt> folder for example, it will be added by default.
   #
   # == Endpoint
   #
@@ -130,8 +132,8 @@ module Rails
   #
   # == Middleware stack
   #
-  # As an engine can now be rack endpoint, it can also have a middleware stack. The usage is exactly
-  # the same as in <tt>Application</tt>:
+  # As an engine can now be a rack endpoint, it can also have a middleware
+  # stack. The usage is exactly the same as in <tt>Application</tt>:
   #
   #   module MyEngine
   #     class Engine < Rails::Engine
@@ -141,8 +143,8 @@ module Rails
   #
   # == Routes
   #
-  # If you don't specify an endpoint, routes will be used as the default endpoint. You can use them
-  # just like you use an application's routes:
+  # If you don't specify an endpoint, routes will be used as the default
+  # endpoint. You can use them just like you use an application's routes:
   #
   #   # ENGINE/config/routes.rb
   #   MyEngine::Engine.routes.draw do
@@ -174,6 +176,7 @@ module Rails
   # == Engine name
   #
   # There are some places where an Engine's name is used:
+  #
   # * routes: when you mount an Engine with <tt>mount(MyEngine::Engine => '/my_engine')</tt>,
   #   it's used as default :as option
   # * some of the rake tasks are based on engine name, e.g. <tt>my_engine:install:migrations</tt>,
@@ -191,8 +194,8 @@ module Rails
   # == Isolated Engine
   #
   # Normally when you create controllers, helpers and models inside an engine, they are treated
-  # as they were created inside the application. This means all application helpers and named routes
-  # will be available to your engine's controllers.
+  # as if they were created inside the application itself. This means that all helpers and
+  # named routes from the application will be available to your engine's controllers as well.
   #
   # However, sometimes you want to isolate your engine from the application, especially if your engine
   # has its own router. To do that, you simply need to call +isolate_namespace+. This method requires
@@ -240,9 +243,9 @@ module Rails
   #     text_field :title # => <input type="text" name="article[title]" id="article_title" />
   #   end
   #
-  # Additionally an isolated engine will set its name according to namespace, so
+  # Additionally, an isolated engine will set its name according to namespace, so
   # MyEngine::Engine.engine_name will be "my_engine". It will also set MyEngine.table_name_prefix
-  # to "my_engine_", changing MyEngine::Article model to use my_engine_article table.
+  # to "my_engine_", changing the MyEngine::Article model to use the my_engine_article table.
   #
   # == Using Engine's routes outside Engine
   #
@@ -274,12 +277,13 @@ module Rails
   #     end
   #   end
   #
-  # Note that the <tt>:as</tt> option given to mount takes the <tt>engine_name</tT> as default, so most of the time
+  # Note that the <tt>:as</tt> option given to mount takes the <tt>engine_name</tt> as default, so most of the time
   # you can simply omit it.
   #
-  # Finally, if you want to generate a url to an engine's route using <tt>polymorphic_url</tt>, you also need
-  # to pass the engine helper. Let's say that you want to create a form pointing to one of the
-  # engine's routes. All you need to do is pass the helper as the first element in array with
+  # Finally, if you want to generate a url to an engine's route using
+  # <tt>polymorphic_url</tt>, you also need to pass the engine helper. Let's
+  # say that you want to create a form pointing to one of the engine's routes.
+  # All you need to do is pass the helper as the first element in array with
   # attributes for url:
   #
   #   form_for([my_engine, @user])
@@ -319,7 +323,7 @@ module Rails
   #
   # Note that some of the migrations may be skipped if a migration with the same name already exists
   # in application. In such a situation you must decide whether to leave that migration or rename the
-  # migration in application and rerun copying migrations.
+  # migration in the application and rerun copying migrations.
   #
   # If your engine has migrations, you may also want to prepare data for the database in
   # the <tt>seeds.rb</tt> file. You can load that data using the <tt>load_seed</tt> method, e.g.
diff --git a/railties/lib/rails/paths.rb b/railties/lib/rails/paths.rb
index 3f1d2ca87d..de3d0b6fc5 100644
--- a/railties/lib/rails/paths.rb
+++ b/railties/lib/rails/paths.rb
@@ -2,7 +2,7 @@ require 'set'
 
 module Rails
   module Paths
-    # This object is an extended hash that behaves as root of the Rails::Paths system.
+    # This object is an extended hash that behaves as root of the <tt>Rails::Paths</tt> system.
     # It allows you to collect information about how you want to structure your application
     # paths by a Hash like API. It requires you to give a physical path on initialization.
     #
@@ -10,13 +10,13 @@ module Rails
     #   root.add "app/controllers", :eager_load => true
     #
     # The command above creates a new root object and add "app/controllers" as a path.
-    # This means we can get a Path object back like below:
+    # This means we can get a +Rails::Paths::Path+ object back like below:
     #
     #   path = root["app/controllers"]
     #   path.eager_load?               # => true
     #   path.is_a?(Rails::Paths::Path) # => true
     #
-    # The Path object is simply an array and allows you to easily add extra paths:
+    # The +Path+ object is simply an array and allows you to easily add extra paths:
     #
     #   path.is_a?(Array) # => true
     #   path.inspect      # => ["app/controllers"]
@@ -24,17 +24,17 @@ module Rails
     #   path << "lib/controllers"
     #   path.inspect      # => ["app/controllers", "lib/controllers"]
     #
-    # Notice that when you add a path using #add, the path object created already
-    # contains the path with the same path value given to #add. In some situations,
+    # Notice that when you add a path using +add+, the path object created already
+    # contains the path with the same path value given to +add+. In some situations,
     # you may not want this behavior, so you can give :with as option.
     #
     #   root.add "config/routes", :with => "config/routes.rb"
     #   root["config/routes"].inspect # => ["config/routes.rb"]
     #
-    # #add also accepts the following options as argument: eager_load, autoload,
-    # autoload_once and glob.
+    # The +add+ method accepts the following options as arguments:
+    # eager_load, autoload, autoload_once and glob.
     #
-    # Finally, the Path object also provides a few helpers:
+    # Finally, the +Path+ object also provides a few helpers:
     #
     #   root = Root.new "/rails"
     #   root.add "app/controllers"
@@ -42,7 +42,7 @@ module Rails
     #   root["app/controllers"].expanded # => ["/rails/app/controllers"]
     #   root["app/controllers"].existent # => ["/rails/app/controllers"]
     #
-    # Check the Path documentation for more information.
+    # Check the <tt>Rails::Paths::Path</tt> documentation for more information.
     class Root < ::Hash
       attr_accessor :path