Merge with docrails.

24 files changed, 149 insertions, 52 deletions

diff --git a/actionpack/lib/action_controller/assertions/selector_assertions.rb b/actionpack/lib/action_controller/assertions/selector_assertions.rb
index d3594e711c..70b0ed53e7 100644
--- a/actionpack/lib/action_controller/assertions/selector_assertions.rb
+++ b/actionpack/lib/action_controller/assertions/selector_assertions.rb
@@ -21,10 +21,8 @@ module ActionController
     # from the response HTML or elements selected by the enclosing assertion.
     # 
     # In addition to HTML responses, you can make the following assertions:
-    # * +assert_select_rjs+ - Assertions on HTML content of RJS update and
-    #     insertion operations.
-    # * +assert_select_encoded+ - Assertions on HTML encoded inside XML,
-    #     for example for dealing with feed item descriptions.
+    # * +assert_select_rjs+ - Assertions on HTML content of RJS update and insertion operations.
+    # * +assert_select_encoded+ - Assertions on HTML encoded inside XML, for example for dealing with feed item descriptions.
     # * +assert_select_email+ - Assertions on the HTML body of an e-mail.
     #
     # Also see HTML::Selector to learn how to use selectors.
diff --git a/actionpack/lib/action_controller/caching/fragments.rb b/actionpack/lib/action_controller/caching/fragments.rb
index b1f25fdf5c..e9b434dd25 100644
--- a/actionpack/lib/action_controller/caching/fragments.rb
+++ b/actionpack/lib/action_controller/caching/fragments.rb
@@ -2,7 +2,7 @@ module ActionController #:nodoc:
   module Caching
     # Fragment caching is used for caching various blocks within templates without caching the entire action as a whole. This is useful when
     # certain elements of an action change frequently or depend on complicated state while other parts rarely change or can be shared amongst multiple
-    # parties. The caching is doing using the cache helper available in the Action View. A template with caching might look something like:
+    # parties. The caching is done using the cache helper available in the Action View. A template with caching might look something like:
     #
     #   <b>Hello <%= @name %></b>
     #   <% cache do %>
diff --git a/actionpack/lib/action_controller/cookies.rb b/actionpack/lib/action_controller/cookies.rb
index a4cddbcea2..0428f2a23d 100644
--- a/actionpack/lib/action_controller/cookies.rb
+++ b/actionpack/lib/action_controller/cookies.rb
@@ -22,6 +22,16 @@ module ActionController #:nodoc:
   #
   #   cookies.delete :user_name
   #
+  # Please note that if you specify a :domain when setting a cookie, you must also specify the domain when deleting the cookie:
+  #
+  #  cookies[:key] = {
+  #    :value => 'a yummy cookie',
+  #    :expires => 1.year.from_now,
+  #    :domain => 'domain.com'
+  #  }
+  #
+  #  cookies.delete(:key, :domain => 'domain.com')
+  #
   # The option symbols for setting cookies are:
   #
   # * <tt>:value</tt> - The cookie's value or list of values (as an array).
diff --git a/actionpack/lib/action_controller/integration.rb b/actionpack/lib/action_controller/integration.rb
index 18c2df8b37..2a732448f2 100644
--- a/actionpack/lib/action_controller/integration.rb
+++ b/actionpack/lib/action_controller/integration.rb
@@ -101,7 +101,7 @@ module ActionController
         @https = flag
       end
 
-      # Return +true+ if the session is mimicing a secure HTTPS request.
+      # Return +true+ if the session is mimicking a secure HTTPS request.
       #
       #   if session.https?
       #     ...
diff --git a/actionpack/lib/action_controller/rack_process.rb b/actionpack/lib/action_controller/rack_process.rb
index ef329b759a..7e0a6b091e 100644
--- a/actionpack/lib/action_controller/rack_process.rb
+++ b/actionpack/lib/action_controller/rack_process.rb
@@ -250,7 +250,7 @@ end_msg
 
           # Convert 'cookie' header to 'Set-Cookie' headers.
           # Because Set-Cookie header can appear more the once in the response body,
-          # we store it in a line break seperated string that will be translated to
+          # we store it in a line break separated string that will be translated to
           # multiple Set-Cookie header by the handler.
           if cookie = options.delete('cookie')
             cookies = []
diff --git a/actionpack/lib/action_controller/request.rb b/actionpack/lib/action_controller/request.rb
index 2d9f6c3e6f..c42f113d2c 100755
--- a/actionpack/lib/action_controller/request.rb
+++ b/actionpack/lib/action_controller/request.rb
@@ -61,7 +61,7 @@ module ActionController
       request_method == :head
     end
 
-    # Provides acccess to the request's HTTP headers, for example:
+    # Provides access to the request's HTTP headers, for example:
     #  request.headers["Content-Type"] # => "text/plain"
     def headers
       @headers ||= ActionController::Http::Headers.new(@env)
@@ -265,7 +265,7 @@ EOM
       parts[0..-(tld_length+2)]
     end
 
-    # Return the query string, accounting for server idiosyncracies.
+    # Return the query string, accounting for server idiosyncrasies.
     def query_string
       if uri = @env['REQUEST_URI']
         uri.split('?', 2)[1] || ''
@@ -274,7 +274,7 @@ EOM
       end
     end
 
-    # Return the request URI, accounting for server idiosyncracies.
+    # Return the request URI, accounting for server idiosyncrasies.
     # WEBrick includes the full URL. IIS leaves REQUEST_URI blank.
     def request_uri
       if uri = @env['REQUEST_URI']
diff --git a/actionpack/lib/action_controller/request_forgery_protection.rb b/actionpack/lib/action_controller/request_forgery_protection.rb
index 02c9d59d07..05a6d8bb79 100644
--- a/actionpack/lib/action_controller/request_forgery_protection.rb
+++ b/actionpack/lib/action_controller/request_forgery_protection.rb
@@ -17,7 +17,7 @@ module ActionController #:nodoc:
     # forged link from another site, is done by embedding a token based on the session (which an attacker wouldn't know) in all
     # forms and Ajax requests generated by Rails and then verifying the authenticity of that token in the controller.  Only
     # HTML/JavaScript requests are checked, so this will not protect your XML API (presumably you'll have a different authentication
-    # scheme there anyway).  Also, GET requests are not protected as these should be indempotent anyway.
+    # scheme there anyway).  Also, GET requests are not protected as these should be idempotent anyway.
     #
     # This is turned on with the <tt>protect_from_forgery</tt> method, which will check the token and raise an
     # ActionController::InvalidAuthenticityToken if it doesn't match what was expected. You can customize the error message in
diff --git a/actionpack/lib/action_controller/resources.rb b/actionpack/lib/action_controller/resources.rb
index af2fcaf3ad..b11aa5625b 100644
--- a/actionpack/lib/action_controller/resources.rb
+++ b/actionpack/lib/action_controller/resources.rb
@@ -296,6 +296,10 @@ module ActionController
     #     article_comments_url(:article_id => @article)
     #     article_comment_url(:article_id => @article, :id => @comment)
     #
+    #   If you don't want to load all objects from the database you might want to use the <tt>article_id</tt> directly:
+    #
+    #     articles_comments_url(@comment.article_id, @comment)
+    #
     # * <tt>:name_prefix</tt> - Define a prefix for all generated routes, usually ending in an underscore.
     #   Use this if you have named routes that may clash.
     #
diff --git a/actionpack/lib/action_controller/streaming.rb b/actionpack/lib/action_controller/streaming.rb
index 186e0e5531..333fb61b45 100644
--- a/actionpack/lib/action_controller/streaming.rb
+++ b/actionpack/lib/action_controller/streaming.rb
@@ -12,19 +12,21 @@ module ActionController #:nodoc:
     X_SENDFILE_HEADER = 'X-Sendfile'.freeze
 
     protected
-      # Sends the file by streaming it 4096 bytes at a time. This way the
-      # whole file doesn't need to be read into memory at once.  This makes
-      # it feasible to send even large files.
+      # Sends the file, by default streaming it 4096 bytes at a time. This way the
+      # whole file doesn't need to be read into memory at once. This makes it
+      # feasible to send even large files. You can optionally turn off streaming
+      # and send the whole file at once.
       #
-      # Be careful to sanitize the path parameter if it coming from a web
+      # Be careful to sanitize the path parameter if it is coming from a web
       # page. <tt>send_file(params[:path])</tt> allows a malicious user to
       # download any file on your server.
       #
       # Options:
       # * <tt>:filename</tt> - suggests a filename for the browser to use.
       #   Defaults to <tt>File.basename(path)</tt>.
-      # * <tt>:type</tt> - specifies an HTTP content type.
-      #   Defaults to 'application/octet-stream'.
+      # * <tt>:type</tt> - specifies an HTTP content type. Defaults to 'application/octet-stream'.
+      # * <tt>:length</tt> - used to manually override the length (in bytes) of the content that
+      #   is going to be sent to the client. Defaults to <tt>File.size(path)</tt>.
       # * <tt>:disposition</tt> - specifies whether the file will be shown inline or downloaded.
       #   Valid values are 'inline' and 'attachment' (default).
       # * <tt>:stream</tt> - whether to send the file to the user agent as it is read (+true+)
@@ -35,6 +37,12 @@ module ActionController #:nodoc:
       # * <tt>:url_based_filename</tt> - set to +true+ if you want the browser guess the filename from
       #   the URL, which is necessary for i18n filenames on certain browsers
       #   (setting <tt>:filename</tt> overrides this option).
+      # * <tt>:x_sendfile</tt> - uses X-Sendfile to send the file when set to +true+. This is currently
+      #   only available with Lighttpd/Apache2 and specific modules installed and activated. Since this
+      #   uses the web server to send the file, this may lower memory consumption on your server and
+      #   it will not block your application for further requests.
+      #   See http://blog.lighttpd.net/articles/2006/07/02/x-sendfile and
+      #   http://tn123.ath.cx/mod_xsendfile/ for details. Defaults to +false+.
       #
       # The default Content-Type and Content-Disposition headers are
       # set to download arbitrary binary files in as many browsers as
@@ -99,8 +107,7 @@ module ActionController #:nodoc:
       #
       # Options:
       # * <tt>:filename</tt> - suggests a filename for the browser to use.
-      # * <tt>:type</tt> - specifies an HTTP content type.
-      #   Defaults to 'application/octet-stream'.
+      # * <tt>:type</tt> - specifies an HTTP content type. Defaults to 'application/octet-stream'.
       # * <tt>:disposition</tt> - specifies whether the file will be shown inline or downloaded.
       #   Valid values are 'inline' and 'attachment' (default).
       # * <tt>:status</tt> - specifies the status code to send with the response. Defaults to '200 OK'.
diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index 77c6f26eac..c09050c390 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -15,6 +15,27 @@ module ActionController
     end
   end
 
+  # Superclass for Action Controller functional tests. Infers the controller under test from the test class name,
+  # and creates @controller, @request, @response instance variables.
+  #
+  #   class WidgetsControllerTest < ActionController::TestCase
+  #     def test_index
+  #       get :index
+  #     end
+  #   end
+  #
+  # * @controller - WidgetController.new
+  # * @request    - ActionController::TestRequest.new
+  # * @response   - ActionController::TestResponse.new
+  #
+  # (Earlier versions of Rails required each functional test to subclass Test::Unit::TestCase and define
+  # @controller, @request, @response in +setup+.)
+  #
+  # If the controller cannot be inferred from the test class name, you can explicity set it with +tests+.
+  #
+  #   class SpecialEdgeCaseWidgetsControllerTest < ActionController::TestCase
+  #     tests WidgetController
+  #   end
   class TestCase < ActiveSupport::TestCase
     # When the request.remote_addr remains the default for testing, which is 0.0.0.0, the exception is simply raised inline
     # (bystepping the regular exception handling from rescue_action). If the request.remote_addr is anything else, the regular
@@ -41,6 +62,8 @@ module ActionController
     @@controller_class = nil
 
     class << self
+      # Sets the controller class name. Useful if the name can't be inferred from test class.
+      # Expects +controller_class+ as a constant. Example: <tt>tests WidgetController</tt>.
       def tests(controller_class)
         self.controller_class = controller_class
       end
diff --git a/actionpack/lib/action_controller/test_process.rb b/actionpack/lib/action_controller/test_process.rb
index a6e0c98936..0b160ff41d 100644
--- a/actionpack/lib/action_controller/test_process.rb
+++ b/actionpack/lib/action_controller/test_process.rb
@@ -211,7 +211,7 @@ module ActionController #:nodoc:
       template._first_render
     end
 
-    # A shortcut to the flash. Returns an empyt hash if no session flash exists.
+    # A shortcut to the flash. Returns an empty hash if no session flash exists.
     def flash
       session['flash'] || {}
     end
diff --git a/actionpack/lib/action_controller/vendor/html-scanner/html/selector.rb b/actionpack/lib/action_controller/vendor/html-scanner/html/selector.rb
index 1a3c770254..376bb87409 100644
--- a/actionpack/lib/action_controller/vendor/html-scanner/html/selector.rb
+++ b/actionpack/lib/action_controller/vendor/html-scanner/html/selector.rb
@@ -64,7 +64,7 @@ module HTML
   #
   # When using a combination of the above, the element name comes first
   # followed by identifier, class names, attributes, pseudo classes and
-  # negation in any order. Do not seprate these parts with spaces!
+  # negation in any order. Do not separate these parts with spaces!
   # Space separation is used for descendant selectors.
   #
   # For example:
@@ -158,7 +158,7 @@ module HTML
   # * <tt>:not(selector)</tt> -- Match the element only if the element does not
   #   match the simple selector.
   #
-  # As you can see, <tt>:nth-child<tt> pseudo class and its varient can get quite
+  # As you can see, <tt>:nth-child<tt> pseudo class and its variant can get quite
   # tricky and the CSS specification doesn't do a much better job explaining it.
   # But after reading the examples and trying a few combinations, it's easy to
   # figure out.
diff --git a/actionpack/lib/action_view/base.rb b/actionpack/lib/action_view/base.rb
index 0ea96f045e..85af73390d 100644
--- a/actionpack/lib/action_view/base.rb
+++ b/actionpack/lib/action_view/base.rb
@@ -177,7 +177,7 @@ module ActionView #:nodoc:
     end
 
     def self.cache_template_extensions=(*args)
-      ActiveSupport::Deprecation.warn("config.action_view.cache_template_extensions option has been deprecated and has no affect. " <<
+      ActiveSupport::Deprecation.warn("config.action_view.cache_template_extensions option has been deprecated and has no effect. " <<
                                        "Please remove it from your config files.", caller)
     end
 
diff --git a/actionpack/lib/action_view/helpers/active_record_helper.rb b/actionpack/lib/action_view/helpers/active_record_helper.rb
index f3f204cc97..e788ebf359 100644
--- a/actionpack/lib/action_view/helpers/active_record_helper.rb
+++ b/actionpack/lib/action_view/helpers/active_record_helper.rb
@@ -141,7 +141,7 @@ module ActionView
       #
       #   error_messages_for 'user_common', 'user', :object_name => 'user'
       #
-      # If the objects cannot be located as instance variables, you can add an extra <tt>:object</tt> paremeter which gives the actual
+      # If the objects cannot be located as instance variables, you can add an extra <tt>:object</tt> parameter which gives the actual
       # object (or array of objects to use):
       #
       #   error_messages_for 'user', :object => @question.user
diff --git a/actionpack/lib/action_view/helpers/date_helper.rb b/actionpack/lib/action_view/helpers/date_helper.rb
index d018034ebe..0735ed07ee 100755
--- a/actionpack/lib/action_view/helpers/date_helper.rb
+++ b/actionpack/lib/action_view/helpers/date_helper.rb
@@ -280,11 +280,11 @@ module ActionView
       #
       #   # Generates a date select that discards the type of the field and defaults to the date in 
       #   # my_date (six days after today)
-      #   select_datetime(my_date_time, :discard_type => true)
+      #   select_date(my_date, :discard_type => true)
       #
       #   # Generates a date select that defaults to the datetime in my_date (six days after today)
       #   # prefixed with 'payday' rather than 'date'
-      #   select_datetime(my_date_time, :prefix => 'payday')
+      #   select_date(my_date, :prefix => 'payday')
       #
       def select_date(date = Date.current, options = {}, html_options = {})
         options[:order] ||= []
diff --git a/actionpack/lib/action_view/helpers/debug_helper.rb b/actionpack/lib/action_view/helpers/debug_helper.rb
index 20de7e465f..90863fca08 100644
--- a/actionpack/lib/action_view/helpers/debug_helper.rb
+++ b/actionpack/lib/action_view/helpers/debug_helper.rb
@@ -2,21 +2,28 @@ module ActionView
   module Helpers
     # Provides a set of methods for making it easier to debug Rails objects.
     module DebugHelper
-      # Returns a <pre>-tag that has +object+ dumped by YAML. This creates a very
-      # readable way to inspect an object.
+      # Returns a YAML representation of +object+ wrapped with <pre> and </pre>.
+      # If the object cannot be converted to YAML using +to_yaml+, +inspect+ will be called instead.
+      # Useful for inspecting an object at the time of rendering.
       #
       # ==== Example
-      #  my_hash = {'first' => 1, 'second' => 'two', 'third' => [1,2,3]}
-      #  debug(my_hash)
       #
-      #  => <pre class='debug_dump'>--- 
-      #  first: 1
-      #  second: two
-      #  third: 
-      #  - 1
-      #  - 2
-      #  - 3
-      #  </pre>
+      #   @user = User.new({ :username => 'testing', :password => 'xyz', :age => 42}) %>
+      #   debug(@user)
+      #   # =>
+      #   <pre class='debug_dump'>--- !ruby/object:User
+      #   attributes:
+      #   &nbsp; updated_at:
+      #   &nbsp; username: testing
+      #
+      #   &nbsp; age: 42
+      #   &nbsp; password: xyz
+      #   &nbsp; created_at:
+      #   attributes_cache: {}
+      #
+      #   new_record: true
+      #   </pre>
+
       def debug(object)
         begin
           Marshal::dump(object)
@@ -28,4 +35,4 @@ module ActionView
       end
     end
   end
-end
\ No newline at end of file
+end
diff --git a/actionpack/lib/action_view/helpers/form_helper.rb b/actionpack/lib/action_view/helpers/form_helper.rb
index bafc635ad2..fa26aa4640 100644
--- a/actionpack/lib/action_view/helpers/form_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_helper.rb
@@ -76,7 +76,7 @@ module ActionView
       # Creates a form and a scope around a specific model object that is used as
       # a base for questioning about values for the fields.
       #
-      # Rails provides succint resource-oriented form generation with +form_for+
+      # Rails provides succinct resource-oriented form generation with +form_for+
       # like this:
       #
       #   <% form_for @offer do |f| %>
@@ -449,8 +449,37 @@ module ActionView
       # assigned to the template (identified by +object+). It's intended that +method+ returns an integer and if that
       # integer is above zero, then the checkbox is checked. Additional options on the input tag can be passed as a
       # hash with +options+. The +checked_value+ defaults to 1 while the default +unchecked_value+
-      # is set to 0 which is convenient for boolean values. Since HTTP standards say that unchecked checkboxes don't post anything,
-      # we add a hidden value with the same name as the checkbox as a work around.
+      # is set to 0 which is convenient for boolean values.
+      #
+      # ==== Gotcha
+      #
+      # The HTML specification says unchecked check boxes are not successful, and
+      # thus web browsers do not send them. Unfortunately this introduces a gotcha:
+      # if an Invoice model has a +paid+ flag, and in the form that edits a paid
+      # invoice the user unchecks its check box, no +paid+ parameter is sent. So,
+      # any mass-assignment idiom like
+      #
+      #   @invoice.update_attributes(params[:invoice])
+      #
+      # wouldn't update the flag.
+      #
+      # To prevent this the helper generates a hidden field with the same name as
+      # the checkbox after the very check box. So, the client either sends only the
+      # hidden field (representing the check box is unchecked), or both fields.
+      # Since the HTML specification says key/value pairs have to be sent in the
+      # same order they appear in the form and Rails parameters extraction always
+      # gets the first occurrence of any given key, that works in ordinary forms.
+      #
+      # Unfortunately that workaround does not work when the check box goes
+      # within an array-like parameter, as in
+      #
+      #   <% fields_for "project[invoice_attributes][]", invoice, :index => nil do |form| %>
+      #     <%= form.check_box :paid %>
+      #     ...
+      #   <% end %>
+      #
+      # because parameter name repetition is precisely what Rails seeks to distinguish
+      # the elements of the array.
       #
       # ==== Examples
       #   # Let's say that @post.validated? is 1:
diff --git a/actionpack/lib/action_view/helpers/form_options_helper.rb b/actionpack/lib/action_view/helpers/form_options_helper.rb
index 87d49397c6..cc609f5d67 100644
--- a/actionpack/lib/action_view/helpers/form_options_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_options_helper.rb
@@ -274,9 +274,11 @@ module ActionView
         end
       end
 
-      # Returns a string of option tags for pretty much any country in the world. Supply a country name as +selected+ to
-      # have it marked as the selected option tag. You can also supply an array of countries as +priority_countries+, so
-      # that they will be listed above the rest of the (long) list.
+      # Returns a string of option tags for most countries in the
+      # world (as defined in COUNTRIES). Supply a country name as
+      # +selected+ to have it marked as the selected option tag. You
+      # can also supply an array of countries as +priority_countries+,
+      # so that they will be listed above the rest of the (long) list.
       #
       # NOTE: Only the option tags are returned, you have to wrap this call in a regular HTML select tag.
       def country_options_for_select(selected = nil, priority_countries = nil)
diff --git a/actionpack/lib/action_view/helpers/javascript_helper.rb b/actionpack/lib/action_view/helpers/javascript_helper.rb
index 22bd5cb440..32089442b7 100644
--- a/actionpack/lib/action_view/helpers/javascript_helper.rb
+++ b/actionpack/lib/action_view/helpers/javascript_helper.rb
@@ -44,13 +44,22 @@ module ActionView
 
       include PrototypeHelper
 
-      # Returns a link that will trigger a JavaScript +function+ using the
+      # Returns a link of the given +name+ that will trigger a JavaScript +function+ using the
       # onclick handler and return false after the fact.
       #
+      # The first argument +name+ is used as the link text.
+      #
+      # The next arguments are optional and may include the javascript function definition and a hash of html_options.
+      #
       # The +function+ argument can be omitted in favor of an +update_page+
       # block, which evaluates to a string when the template is rendered
       # (instead of making an Ajax request first).
       #
+      # The +html_options+ will accept a hash of html attributes for the link tag. Some examples are :class => "nav_button", :id => "articles_nav_button"
+      #
+      # Note: if you choose to specify the javascript function in a block, but would like to pass html_options, set the +function+ parameter to nil
+      #
+      #
       # Examples:
       #   link_to_function "Greeting", "alert('Hello world!')"
       #     Produces:
@@ -89,13 +98,21 @@ module ActionView
         content_tag(:a, name, html_options.merge(:href => href, :onclick => onclick))
       end
 
-      # Returns a button that'll trigger a JavaScript +function+ using the
+      # Returns a button with the given +name+ text that'll trigger a JavaScript +function+ using the
       # onclick handler.
       #
+      # The first argument +name+ is used as the button's value or display text.
+      #
+      # The next arguments are optional and may include the javascript function definition and a hash of html_options.
+      #
       # The +function+ argument can be omitted in favor of an +update_page+
       # block, which evaluates to a string when the template is rendered
       # (instead of making an Ajax request first).
       #
+      # The +html_options+ will accept a hash of html attributes for the link tag. Some examples are :class => "nav_button", :id => "articles_nav_button"
+      #
+      # Note: if you choose to specify the javascript function in a block, but would like to pass html_options, set the +function+ parameter to nil
+      #
       # Examples:
       #   button_to_function "Greeting", "alert('Hello world!')"
       #   button_to_function "Delete", "if (confirm('Really?')) do_delete()"
diff --git a/actionpack/lib/action_view/helpers/prototype_helper.rb b/actionpack/lib/action_view/helpers/prototype_helper.rb
index 8c8c22dd4a..cb4b53a9f7 100644
--- a/actionpack/lib/action_view/helpers/prototype_helper.rb
+++ b/actionpack/lib/action_view/helpers/prototype_helper.rb
@@ -61,7 +61,7 @@ module ActionView
     #
     # == Designing your Rails actions for Ajax
     # When building your action handlers (that is, the Rails actions that receive your background requests), it's
-    # important to remember a few things.  First, whatever your action would normall return to the browser, it will
+    # important to remember a few things.  First, whatever your action would normally return to the browser, it will
     # return to the Ajax call.  As such, you typically don't want to render with a layout.  This call will cause
     # the layout to be transmitted back to your page, and, if you have a full HTML/CSS, will likely mess a lot of things up.
     # You can turn the layout off on particular actions by doing the following:
diff --git a/actionpack/lib/action_view/helpers/sanitize_helper.rb b/actionpack/lib/action_view/helpers/sanitize_helper.rb
index b0dacfe964..c3c03394ee 100644
--- a/actionpack/lib/action_view/helpers/sanitize_helper.rb
+++ b/actionpack/lib/action_view/helpers/sanitize_helper.rb
@@ -184,7 +184,7 @@ module ActionView
           HTML::WhiteListSanitizer.allowed_attributes.merge(attributes)
         end
 
-        # Adds to the Set of allowed CSS properties for the #sanitize and +sanitize_css+ heleprs.
+        # Adds to the Set of allowed CSS properties for the #sanitize and +sanitize_css+ helpers.
         #
         #   Rails::Initializer.run do |config|
         #     config.action_view.sanitized_allowed_css_properties = 'expression'
diff --git a/actionpack/lib/action_view/helpers/scriptaculous_helper.rb b/actionpack/lib/action_view/helpers/scriptaculous_helper.rb
index c9b2761cb8..b938c1a801 100644
--- a/actionpack/lib/action_view/helpers/scriptaculous_helper.rb
+++ b/actionpack/lib/action_view/helpers/scriptaculous_helper.rb
@@ -193,7 +193,7 @@ module ActionView
       #                          
       # * <tt>:onDrop</tt> - Called when a +draggable_element+ is dropped onto
       #   this element. Override this callback with a JavaScript expression to 
-      #   change the default drop behavour. Example:
+      #   change the default drop behaviour. Example:
       #                          
       #     :onDrop => "function(draggable_element, droppable_element, event) { alert('I like bananas') }"
       #                          
diff --git a/actionpack/lib/action_view/helpers/tag_helper.rb b/actionpack/lib/action_view/helpers/tag_helper.rb
index 5a296da247..de08672d2d 100644
--- a/actionpack/lib/action_view/helpers/tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/tag_helper.rb
@@ -64,7 +64,7 @@ module ActionView
       #   <% content_tag :div, :class => "strong" do -%>
       #     Hello world!
       #   <% end -%>
-      #    # => <div class="strong"><p>Hello world!</p></div>
+      #    # => <div class="strong">Hello world!</div>
       def content_tag(name, content_or_options_with_block = nil, options = nil, escape = true, &block)
         if block_given?
           options = content_or_options_with_block if content_or_options_with_block.is_a?(Hash)
diff --git a/actionpack/lib/action_view/helpers/url_helper.rb b/actionpack/lib/action_view/helpers/url_helper.rb
index e5178938fd..94e1f1d33a 100644
--- a/actionpack/lib/action_view/helpers/url_helper.rb
+++ b/actionpack/lib/action_view/helpers/url_helper.rb
@@ -185,7 +185,7 @@ module ActionView
       #   link_to "Nonsense search", searches_path(:foo => "bar", :baz => "quux")
       #   # => <a href="/searches?foo=bar&amp;baz=quux">Nonsense search</a>
       #
-      # The three options specfic to +link_to+ (<tt>:confirm</tt>, <tt>:popup</tt>, and <tt>:method</tt>) are used as follows:
+      # The three options specific to +link_to+ (<tt>:confirm</tt>, <tt>:popup</tt>, and <tt>:method</tt>) are used as follows:
       #
       #   link_to "Visit Other Site", "http://www.rubyonrails.org/", :confirm => "Are you sure?"
       #   # => <a href="http://www.rubyonrails.org/" onclick="return confirm('Are you sure?');">Visit Other Site</a>