Merge branch 'master' into i18n-merge

Conflicts:

	actionpack/lib/action_view/helpers/form_options_helper.rb
	activerecord/lib/active_record/validations.rb

28 files changed, 191 insertions, 55 deletions

diff --git a/activesupport/lib/active_support/cache/mem_cache_store.rb b/activesupport/lib/active_support/cache/mem_cache_store.rb
index b3769b812f..58958dccef 100644
--- a/activesupport/lib/active_support/cache/mem_cache_store.rb
+++ b/activesupport/lib/active_support/cache/mem_cache_store.rb
@@ -29,8 +29,8 @@ module ActiveSupport
         nil
       end
 
-      # Set key = value. Pass :unless_exist => true if you don't 
-      # want to update the cache if the key is already set. 
+      # Set key = value. Pass :unless_exist => true if you don't
+      # want to update the cache if the key is already set.
       def write(key, value, options = nil)
         super
         method = options && options[:unless_exist] ? :add : :set
@@ -56,33 +56,33 @@ module ActiveSupport
         !read(key, options).nil?
       end
 
-      def increment(key, amount = 1)       
+      def increment(key, amount = 1)
         log("incrementing", key, amount)
-        
-        response = @data.incr(key, amount)  
+
+        response = @data.incr(key, amount)
         response == Response::NOT_FOUND ? nil : response
-      rescue MemCache::MemCacheError 
+      rescue MemCache::MemCacheError
         nil
       end
 
       def decrement(key, amount = 1)
         log("decrement", key, amount)
-        
-        response = data.decr(key, amount) 
+
+        response = @data.decr(key, amount)
         response == Response::NOT_FOUND ? nil : response
-      rescue MemCache::MemCacheError 
+      rescue MemCache::MemCacheError
         nil
-      end        
-      
+      end
+
       def delete_matched(matcher, options = nil)
         super
         raise "Not supported by Memcache"
-      end        
-      
+      end
+
       def clear
         @data.flush_all
-      end        
-      
+      end
+
       def stats
         @data.stats
       end
diff --git a/activesupport/lib/active_support/core_ext/bigdecimal/conversions.rb b/activesupport/lib/active_support/core_ext/bigdecimal/conversions.rb
index d2b01b1b8d..94c7c779f7 100644
--- a/activesupport/lib/active_support/core_ext/bigdecimal/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/bigdecimal/conversions.rb
@@ -21,7 +21,7 @@ module ActiveSupport #:nodoc:
             # This emits the number without any scientific notation.
             # I prefer it to using self.to_f.to_s, which would lose precision.
             #
-            # Note that YAML allows that when reconsituting floats
+            # Note that YAML allows that when reconstituting floats
             # to native types, some precision may get lost.
             # There is no full precision real YAML tag that I am aware of.
             str = self.to_s
diff --git a/activesupport/lib/active_support/core_ext/hash.rb b/activesupport/lib/active_support/core_ext/hash.rb
index 6cbd9dd378..a6065ab48e 100644
--- a/activesupport/lib/active_support/core_ext/hash.rb
+++ b/activesupport/lib/active_support/core_ext/hash.rb
@@ -1,10 +1,11 @@
-%w(keys indifferent_access reverse_merge conversions diff slice except).each do |ext|
+%w(keys indifferent_access deep_merge reverse_merge conversions diff slice except).each do |ext|
   require "active_support/core_ext/hash/#{ext}"
 end
 
 class Hash #:nodoc:
   include ActiveSupport::CoreExtensions::Hash::Keys
   include ActiveSupport::CoreExtensions::Hash::IndifferentAccess
+  include ActiveSupport::CoreExtensions::Hash::DeepMerge
   include ActiveSupport::CoreExtensions::Hash::ReverseMerge
   include ActiveSupport::CoreExtensions::Hash::Conversions
   include ActiveSupport::CoreExtensions::Hash::Diff
diff --git a/activesupport/lib/active_support/core_ext/hash/deep_merge.rb b/activesupport/lib/active_support/core_ext/hash/deep_merge.rb
new file mode 100644
index 0000000000..f8842ba57a
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/hash/deep_merge.rb
@@ -0,0 +1,23 @@
+module ActiveSupport #:nodoc:
+  module CoreExtensions #:nodoc:
+    module Hash #:nodoc:
+      # Allows for deep merging
+      module DeepMerge
+        # Returns a new hash with +self+ and +other_hash+ merged recursively.
+        def deep_merge(other_hash)
+          self.merge(other_hash) do |key, oldval, newval|
+            oldval = oldval.to_hash if oldval.respond_to?(:to_hash)
+            newval = newval.to_hash if newval.respond_to?(:to_hash)
+            oldval.class.to_s == 'Hash' && newval.class.to_s == 'Hash' ? oldval.deep_merge(newval) : newval
+          end
+        end
+
+        # Returns a new hash with +self+ and +other_hash+ merged recursively.
+        # Modifies the receiver in place.
+        def deep_merge!(other_hash)
+          replace(deep_merge(other_hash))
+        end
+      end
+    end
+  end
+end
diff --git a/activesupport/lib/active_support/core_ext/hash/except.rb b/activesupport/lib/active_support/core_ext/hash/except.rb
index bc97fa35a6..f26d01553d 100644
--- a/activesupport/lib/active_support/core_ext/hash/except.rb
+++ b/activesupport/lib/active_support/core_ext/hash/except.rb
@@ -13,7 +13,7 @@ module ActiveSupport #:nodoc:
           clone.except!(*keys)
         end
 
-        # Replaces the hash without only the given keys.
+        # Replaces the hash without the given keys.
         def except!(*keys)
           keys.map! { |key| convert_key(key) } if respond_to?(:convert_key)
           keys.each { |key| delete(key) }
diff --git a/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb b/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb
index 7af10846e7..546e261cc9 100644
--- a/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb
+++ b/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb
@@ -1,21 +1,28 @@
 module ActiveSupport #:nodoc:
   module CoreExtensions #:nodoc:
     module Hash #:nodoc:
-      # Allows for reverse merging where its the keys in the calling hash that wins over those in the <tt>other_hash</tt>.
-      # This is particularly useful for initializing an incoming option hash with default values:
+      # Allows for reverse merging two hashes where the keys in the calling hash take precedence over those
+      # in the <tt>other_hash</tt>. This is particularly useful for initializing an option hash with default values:
       #
       #   def setup(options = {})
       #     options.reverse_merge! :size => 25, :velocity => 10
       #   end
       #
-      # The default <tt>:size</tt> and <tt>:velocity</tt> is only set if the +options+ passed in doesn't already have those keys set.
+      # Using <tt>merge</tt>, the above example would look as follows:
+      #
+      #   def setup(options = {})
+      #     { :size => 25, :velocity => 10 }.merge(options)
+      #   end
+      #
+      # The default <tt>:size</tt> and <tt>:velocity</tt> are only set if the +options+ hash passed in doesn't already
+      # have the respective key.
       module ReverseMerge
-        # Performs the opposite of merge, with the keys and values from the first hash taking precedence over the second.
+        # Performs the opposite of <tt>merge</tt>, with the keys and values from the first hash taking precedence over the second.
         def reverse_merge(other_hash)
           other_hash.merge(self)
         end
 
-        # Performs the opposite of merge, with the keys and values from the first hash taking precedence over the second.
+        # Performs the opposite of <tt>merge</tt>, with the keys and values from the first hash taking precedence over the second.
         # Modifies the receiver in place.
         def reverse_merge!(other_hash)
           replace(reverse_merge(other_hash))
diff --git a/activesupport/lib/active_support/core_ext/hash/slice.rb b/activesupport/lib/active_support/core_ext/hash/slice.rb
index be4dec6e53..3f14470f36 100644
--- a/activesupport/lib/active_support/core_ext/hash/slice.rb
+++ b/activesupport/lib/active_support/core_ext/hash/slice.rb
@@ -9,6 +9,11 @@ module ActiveSupport #:nodoc:
       #   end
       #
       #   search(options.slice(:mass, :velocity, :time))
+      #
+      # If you have an array of keys you want to limit to, you should splat them:
+      #
+      #   valid_keys = [:mass, :velocity, :time]
+      #   search(options.slice(*valid_keys))
       module Slice
         # Returns a new hash with only the given keys.
         def slice(*keys)
diff --git a/activesupport/lib/active_support/core_ext/object.rb b/activesupport/lib/active_support/core_ext/object.rb
index bbc7d81672..0796a7b710 100644
--- a/activesupport/lib/active_support/core_ext/object.rb
+++ b/activesupport/lib/active_support/core_ext/object.rb
@@ -1,4 +1,5 @@
 require 'active_support/core_ext/object/conversions'
 require 'active_support/core_ext/object/extending'
 require 'active_support/core_ext/object/instance_variables'
+require 'active_support/core_ext/object/metaclass'
 require 'active_support/core_ext/object/misc'
diff --git a/activesupport/lib/active_support/core_ext/object/metaclass.rb b/activesupport/lib/active_support/core_ext/object/metaclass.rb
new file mode 100644
index 0000000000..169a76dfb7
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/object/metaclass.rb
@@ -0,0 +1,8 @@
+class Object
+  # Get object's meta (ghost, eigenclass, singleton) class
+  def metaclass
+    class << self
+      self
+    end
+  end
+end
diff --git a/activesupport/lib/active_support/core_ext/string/inflections.rb b/activesupport/lib/active_support/core_ext/string/inflections.rb
index a009d7c085..3bbad7dad8 100644
--- a/activesupport/lib/active_support/core_ext/string/inflections.rb
+++ b/activesupport/lib/active_support/core_ext/string/inflections.rb
@@ -24,8 +24,8 @@ module ActiveSupport #:nodoc:
         #
         #   "posts".singularize            # => "post"
         #   "octopi".singularize           # => "octopus"
-        #   "sheep".singluarize            # => "sheep"
-        #   "word".singluarize             # => "word"
+        #   "sheep".singularize            # => "sheep"
+        #   "word".singularize             # => "word"
         #   "the blue mailmen".singularize # => "the blue mailman"
         #   "CamelOctopi".singularize      # => "CamelOctopus"
         def singularize
diff --git a/activesupport/lib/active_support/core_ext/time/calculations.rb b/activesupport/lib/active_support/core_ext/time/calculations.rb
index 2cce782676..cd234c9b89 100644
--- a/activesupport/lib/active_support/core_ext/time/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/time/calculations.rb
@@ -261,7 +261,7 @@ module ActiveSupport #:nodoc:
         # Layers additional behavior on Time#<=> so that DateTime and ActiveSupport::TimeWithZone instances
         # can be chronologically compared with a Time
         def compare_with_coercion(other)
-          # if other is an ActiveSupport::TimeWithZone, coerce a Time instance from it so we can do <=> comparision
+          # if other is an ActiveSupport::TimeWithZone, coerce a Time instance from it so we can do <=> comparison
           other = other.comparable_time if other.respond_to?(:comparable_time)
           if other.acts_like?(:date)
             # other is a Date/DateTime, so coerce self #to_datetime and hand off to DateTime#<=>
diff --git a/activesupport/lib/active_support/json.rb b/activesupport/lib/active_support/json.rb
index 54a7becd0f..2bdb4a7b11 100644
--- a/activesupport/lib/active_support/json.rb
+++ b/activesupport/lib/active_support/json.rb
@@ -1,5 +1,5 @@
 module ActiveSupport
-  # If true, use ISO 8601 format for dates and times.  Otherwise, fall back to the Active Support legacy format.
+  # If true, use ISO 8601 format for dates and times. Otherwise, fall back to the Active Support legacy format.
   mattr_accessor :use_standard_json_time_format
 
   class << self
diff --git a/activesupport/lib/active_support/json/encoders/date.rb b/activesupport/lib/active_support/json/encoders/date.rb
index cb9419d29d..1fc99c466f 100644
--- a/activesupport/lib/active_support/json/encoders/date.rb
+++ b/activesupport/lib/active_support/json/encoders/date.rb
@@ -1,7 +1,14 @@
 class Date
-  # Returns a JSON string representing the date.
+  # Returns a JSON string representing the date. If ActiveSupport.use_standard_json_time_format is set to true, the
+  # ISO 8601 format is used.
   #
-  # ==== Example:
+  # ==== Examples:
+  #
+  #   # With ActiveSupport.use_standard_json_time_format = true
+  #   Date.new(2005,2,1).to_json
+  #   # => "2005-02-01"
+  #
+  #   # With ActiveSupport.use_standard_json_time_format = false
   #   Date.new(2005,2,1).to_json
   #   # => "2005/02/01"
   def to_json(options = nil)
diff --git a/activesupport/lib/active_support/json/encoders/date_time.rb b/activesupport/lib/active_support/json/encoders/date_time.rb
index a4a5efbfb1..e259930033 100644
--- a/activesupport/lib/active_support/json/encoders/date_time.rb
+++ b/activesupport/lib/active_support/json/encoders/date_time.rb
@@ -1,7 +1,14 @@
 class DateTime
-  # Returns a JSON string representing the datetime.
+  # Returns a JSON string representing the datetime. If ActiveSupport.use_standard_json_time_format is set to true, the
+  # ISO 8601 format is used.
   #
-  # ==== Example:
+  # ==== Examples:
+  #
+  #   # With ActiveSupport.use_standard_json_time_format = true
+  #   DateTime.civil(2005,2,1,15,15,10).to_json
+  #   # => "2005-02-01T15:15:10+00:00"
+  #
+  #   # With ActiveSupport.use_standard_json_time_format = false
   #   DateTime.civil(2005,2,1,15,15,10).to_json
   #   # => "2005/02/01 15:15:10 +0000"
   def to_json(options = nil)
diff --git a/activesupport/lib/active_support/json/encoders/time.rb b/activesupport/lib/active_support/json/encoders/time.rb
index 57ed3c9e31..09fc614889 100644
--- a/activesupport/lib/active_support/json/encoders/time.rb
+++ b/activesupport/lib/active_support/json/encoders/time.rb
@@ -1,9 +1,16 @@
 class Time
-  # Returns a JSON string representing the time.
+  # Returns a JSON string representing the time. If ActiveSupport.use_standard_json_time_format is set to true, the
+  # ISO 8601 format is used.
   #
-  # ==== Example:
+  # ==== Examples:
+  #
+  #   # With ActiveSupport.use_standard_json_time_format = true
+  #   Time.utc(2005,2,1,15,15,10).to_json
+  #   # => "2005-02-01T15:15:10Z"
+  #
+  #   # With ActiveSupport.use_standard_json_time_format = false
   #   Time.utc(2005,2,1,15,15,10).to_json
-  #   # => 2005/02/01 15:15:10 +0000"
+  #   # => "2005/02/01 15:15:10 +0000"
   def to_json(options = nil)
     if ActiveSupport.use_standard_json_time_format
       xmlschema.inspect
diff --git a/activesupport/lib/active_support/option_merger.rb b/activesupport/lib/active_support/option_merger.rb
index 1a4ff9db9a..c77bca1ac9 100644
--- a/activesupport/lib/active_support/option_merger.rb
+++ b/activesupport/lib/active_support/option_merger.rb
@@ -10,16 +10,8 @@ module ActiveSupport
 
     private
       def method_missing(method, *arguments, &block)
-        merge_argument_options! arguments
+        arguments << (arguments.last.respond_to?(:to_hash) ? @options.deep_merge(arguments.pop) : @options.dup)
         @context.send!(method, *arguments, &block)
       end
-
-      def merge_argument_options!(arguments)
-        arguments << if arguments.last.respond_to? :to_hash
-          @options.merge(arguments.pop)
-        else
-          @options.dup
-        end
-      end
   end
 end
diff --git a/activesupport/lib/active_support/time_with_zone.rb b/activesupport/lib/active_support/time_with_zone.rb
index e85bfe9b2e..4866fa0dc8 100644
--- a/activesupport/lib/active_support/time_with_zone.rb
+++ b/activesupport/lib/active_support/time_with_zone.rb
@@ -102,7 +102,19 @@ module ActiveSupport
       "#{time.strftime("%Y-%m-%dT%H:%M:%S")}#{formatted_offset(true, 'Z')}"
     end
     alias_method :iso8601, :xmlschema
-  
+
+    # Returns a JSON string representing the TimeWithZone. If ActiveSupport.use_standard_json_time_format is set to
+    # true, the ISO 8601 format is used.
+    #
+    # ==== Examples:
+    #
+    #   # With ActiveSupport.use_standard_json_time_format = true
+    #   Time.utc(2005,2,1,15,15,10).in_time_zone.to_json
+    #   # => "2005-02-01T15:15:10Z"
+    #
+    #   # With ActiveSupport.use_standard_json_time_format = false
+    #   Time.utc(2005,2,1,15,15,10).in_time_zone.to_json
+    #   # => "2005/02/01 15:15:10 +0000"
     def to_json(options = nil)
       if ActiveSupport.use_standard_json_time_format
         xmlschema.inspect
diff --git a/activesupport/lib/active_support/vendor/builder-2.1.2/builder/xmlevents.rb b/activesupport/lib/active_support/vendor/builder-2.1.2/builder/xmlevents.rb
index 91fcd21e13..b373e4da3c 100644
--- a/activesupport/lib/active_support/vendor/builder-2.1.2/builder/xmlevents.rb
+++ b/activesupport/lib/active_support/vendor/builder-2.1.2/builder/xmlevents.rb
@@ -20,7 +20,7 @@ module Builder
   # markup.
   #
   # Usage:
-  #   xe = Builder::XmlEvents.new(hander)
+  #   xe = Builder::XmlEvents.new(handler)
   #   xe.title("HI")    # Sends start_tag/end_tag/text messages to the handler.
   #
   # Indentation may also be selected by providing value for the
diff --git a/activesupport/lib/active_support/vendor/memcache-client-1.5.0/memcache.rb b/activesupport/lib/active_support/vendor/memcache-client-1.5.0/memcache.rb
index dda7f2c30e..30113201a6 100644
--- a/activesupport/lib/active_support/vendor/memcache-client-1.5.0/memcache.rb
+++ b/activesupport/lib/active_support/vendor/memcache-client-1.5.0/memcache.rb
@@ -119,7 +119,7 @@ class MemCache
   # Valid options for +opts+ are:
   #
   #   [:namespace]   Prepends this value to all keys added or retrieved.
-  #   [:readonly]    Raises an exeception on cache writes when true.
+  #   [:readonly]    Raises an exception on cache writes when true.
   #   [:multithread] Wraps cache access in a Mutex for thread safety.
   #
   # Other options are ignored.
@@ -207,7 +207,7 @@ class MemCache
   end
 
   ##
-  # Deceremets the value for +key+ by +amount+ and returns the new value.
+  # Decrements the value for +key+ by +amount+ and returns the new value.
   # +key+ must already exist.  If +key+ is not an integer, it is assumed to be
   # 0.  +key+ can not be decremented below 0.
 
diff --git a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/data_timezone.rb b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/data_timezone.rb
index 5eccbdf0db..2510e90b5b 100644
--- a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/data_timezone.rb
+++ b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/data_timezone.rb
@@ -38,7 +38,7 @@ module TZInfo
     
     # Returns the set of TimezonePeriod instances that are valid for the given
     # local time as an array. If you just want a single period, use 
-    # period_for_local instead and specify how abiguities should be resolved.
+    # period_for_local instead and specify how ambiguities should be resolved.
     # Raises PeriodNotFound if no periods are found for the given time.
     def periods_for_local(local)
       info.periods_for_local(local)
diff --git a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/data_timezone_info.rb b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/data_timezone_info.rb
index a45d94554b..8829ba9cc8 100644
--- a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/data_timezone_info.rb
+++ b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/data_timezone_info.rb
@@ -66,7 +66,7 @@ module TZInfo
     # ArgumentError will be raised if a transition is added out of order.
     # offset_id refers to an id defined with offset. ArgumentError will be 
     # raised if the offset_id cannot be found. numerator_or_time and
-    # denomiator specify the time the transition occurs as. See 
+    # denominator specify the time the transition occurs as. See
     # TimezoneTransitionInfo for more detail about specifying times.
     def transition(year, month, offset_id, numerator_or_time, denominator = nil)
       offset = @offsets[offset_id]      
diff --git a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/linked_timezone.rb b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/linked_timezone.rb
index f8ec4fca87..c757485b84 100644
--- a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/linked_timezone.rb
+++ b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/linked_timezone.rb
@@ -36,7 +36,7 @@ module TZInfo
     
     # Returns the set of TimezonePeriod instances that are valid for the given
     # local time as an array. If you just want a single period, use 
-    # period_for_local instead and specify how abiguities should be resolved.
+    # period_for_local instead and specify how ambiguities should be resolved.
     # Raises PeriodNotFound if no periods are found for the given time.
     def periods_for_local(local)
       @linked_timezone.periods_for_local(local)
diff --git a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/timezone.rb b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/timezone.rb
index f87fb6fb70..eeaa772d0f 100644
--- a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/timezone.rb
+++ b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/timezone.rb
@@ -121,7 +121,7 @@ module TZInfo
       TimezoneProxy.new(identifier)
     end
     
-    # If identifier is nil calls super(), otherwise calls get. An identfier 
+    # If identifier is nil calls super(), otherwise calls get. An identifier
     # should always be passed in when called externally.
     def self.new(identifier = nil)
       if identifier        
diff --git a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/timezone_transition_info.rb b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/timezone_transition_info.rb
index 3fecb24f0d..781764f0b0 100644
--- a/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/timezone_transition_info.rb
+++ b/activesupport/lib/active_support/vendor/tzinfo-0.3.9/tzinfo/timezone_transition_info.rb
@@ -37,7 +37,7 @@ module TZInfo
     attr_reader :numerator_or_time
     protected :numerator_or_time
     
-    # Either the denominotor of the DateTime if the transition time is defined
+    # Either the denominator of the DateTime if the transition time is defined
     # as a DateTime, otherwise nil. 
     attr_reader :denominator
     protected :denominator
diff --git a/activesupport/lib/active_support/vendor/xml-simple-1.0.11/xmlsimple.rb b/activesupport/lib/active_support/vendor/xml-simple-1.0.11/xmlsimple.rb
index 0de24c0eff..ec6dab513f 100644
--- a/activesupport/lib/active_support/vendor/xml-simple-1.0.11/xmlsimple.rb
+++ b/activesupport/lib/active_support/vendor/xml-simple-1.0.11/xmlsimple.rb
@@ -121,7 +121,7 @@ class XmlSimple
   # Create a "global" cache.
   @@cache = Cache.new
 
-  # Creates and intializes a new XmlSimple object.
+  # Creates and initializes a new XmlSimple object.
   # 
   # defaults::
   #   Default values for options.
@@ -497,7 +497,7 @@ class XmlSimple
       }
     end
     
-    # Fold Hases containing a single anonymous Array up into just the Array.
+    # Fold Hashes containing a single anonymous Array up into just the Array.
     if count == 1 
       anonymoustag = @options['anonymoustag']
       if result.has_key?(anonymoustag) && result[anonymoustag].instance_of?(Array)
@@ -907,7 +907,7 @@ class XmlSimple
   # Thanks to Norbert Gawor for a bugfix.
   #
   # value::
-  #   Value to be checked for emptyness.
+  #   Value to be checked for emptiness.
   def empty(value)
     case value
       when Hash
diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb
index 69028a123f..fc8ed45358 100644
--- a/activesupport/test/core_ext/hash_ext_test.rb
+++ b/activesupport/test/core_ext/hash_ext_test.rb
@@ -245,6 +245,16 @@ class HashExtTest < Test::Unit::TestCase
     assert(!indiff.keys.any? {|k| k.kind_of? String}, "A key was converted to a string!")
   end
 
+  def test_deep_merge
+    hash_1 = { :a => "a", :b => "b", :c => { :c1 => "c1", :c2 => "c2", :c3 => { :d1 => "d1" } } }
+    hash_2 = { :a => 1, :c => { :c1 => 2, :c3 => { :d2 => "d2" } } }
+    expected = { :a => 1, :b => "b", :c => { :c1 => 2, :c2 => "c2", :c3 => { :d1 => "d1", :d2 => "d2" } } }
+    assert_equal expected, hash_1.deep_merge(hash_2)
+
+    hash_1.deep_merge!(hash_2)
+    assert_equal expected, hash_1
+  end
+
   def test_reverse_merge
     defaults = { :a => "x", :b => "y", :c => 10 }.freeze
     options  = { :a => 1, :b => 2 }
@@ -282,6 +292,27 @@ class HashExtTest < Test::Unit::TestCase
     assert_equal expected, original
   end
 
+  def test_slice_with_an_array_key
+    original = { :a => 'x', :b => 'y', :c => 10, [:a, :b] => "an array key" }
+    expected = { [:a, :b] => "an array key", :c => 10 }
+
+    # Should return a new hash with only the given keys when given an array key.
+    assert_equal expected, original.slice([:a, :b], :c)
+    assert_not_equal expected, original
+
+    # Should replace the hash with only the given keys when given an array key.
+    assert_equal expected, original.slice!([:a, :b], :c)
+    assert_equal expected, original
+  end
+
+  def test_slice_with_splatted_keys
+    original = { :a => 'x', :b => 'y', :c => 10, [:a, :b] => "an array key" }
+    expected = { :a => 'x', :b => "y" }
+
+    # Should grab each of the splatted keys.
+    assert_equal expected, original.slice(*[:a, :b])
+  end
+
   def test_indifferent_slice
     original = { :a => 'x', :b => 'y', :c => 10 }.with_indifferent_access
     expected = { :a => 'x', :b => 'y' }.with_indifferent_access
diff --git a/activesupport/test/core_ext/object_and_class_ext_test.rb b/activesupport/test/core_ext/object_and_class_ext_test.rb
index 16f4ab888e..b0a746fdc7 100644
--- a/activesupport/test/core_ext/object_and_class_ext_test.rb
+++ b/activesupport/test/core_ext/object_and_class_ext_test.rb
@@ -173,6 +173,14 @@ class ObjectTests < Test::Unit::TestCase
     assert duck.acts_like?(:time)
     assert !duck.acts_like?(:date)
   end
+
+  def test_metaclass
+    string = "Hello"
+    string.metaclass.instance_eval do
+      define_method(:foo) { "bar" }
+    end
+    assert_equal "bar", string.foo
+  end
 end
 
 class ObjectInstanceVariableTest < Test::Unit::TestCase
diff --git a/activesupport/test/option_merger_test.rb b/activesupport/test/option_merger_test.rb
index 509c6d3bad..0d72314880 100644
--- a/activesupport/test/option_merger_test.rb
+++ b/activesupport/test/option_merger_test.rb
@@ -38,6 +38,33 @@ class OptionMergerTest < Test::Unit::TestCase
     end
   end
 
+  def test_nested_method_with_options_containing_hashes_merge
+    with_options :conditions => { :method => :get } do |outer|
+      outer.with_options :conditions => { :domain => "www" } do |inner|
+        expected = { :conditions => { :method => :get, :domain => "www" } }
+        assert_equal expected, inner.method_with_options
+      end
+    end
+  end
+
+  def test_nested_method_with_options_containing_hashes_overwrite
+    with_options :conditions => { :method => :get, :domain => "www" } do |outer|
+      outer.with_options :conditions => { :method => :post } do |inner|
+        expected = { :conditions => { :method => :post, :domain => "www" } }
+        assert_equal expected, inner.method_with_options
+      end
+    end
+  end
+
+  def test_nested_method_with_options_containing_hashes_going_deep
+    with_options :html => { :class => "foo", :style => { :margin => 0, :display => "block" } } do |outer|
+      outer.with_options :html => { :title => "bar", :style => { :margin => "1em", :color => "#fff" } } do |inner|
+        expected = { :html => { :class => "foo", :title => "bar", :style => { :margin => "1em", :display => "block", :color => "#fff" } } }
+        assert_equal expected, inner.method_with_options
+      end
+    end
+  end
+
   # Needed when counting objects with the ObjectSpace
   def test_option_merger_class_method
     assert_equal ActiveSupport::OptionMerger, ActiveSupport::OptionMerger.new('', '').class