Remove extra white spaces on ActiveModel docs.

activemodel/lib/active_model/callbacks.rb

@@ -59,7 +59,7 @@ def self.extended(base)
     #   define_model_callbacks :initializer, :only => :after
     #
     # Note, the <tt>:only => <type></tt> hash will apply to all callbacks defined on
-    # that method call.  To get around this you can call the define_model_callbacks
+    # that method call. To get around this you can call the define_model_callbacks
     # method as many times as you need.
     #
     #   define_model_callbacks :create, :only => :after

activemodel/lib/active_model/errors.rb

@@ -49,8 +49,8 @@ module ActiveModel
   #
   # The last three methods are required in your object for Errors to be
   # able to generate error messages correctly and also handle multiple
-  # languages.  Of course, if you extend your object with ActiveModel::Translations
-  # you will not need to implement the last two.  Likewise, using
+  # languages. Of course, if you extend your object with ActiveModel::Translations
+  # you will not need to implement the last two. Likewise, using
   # ActiveModel::Validations will handle the validation related methods
   # for you.
   #
@@ -117,7 +117,7 @@ def []=(attribute, error)
     end
 
     # Iterates through each error key, value pair in the error messages hash.
-    # Yields the attribute and the error for that attribute.  If the attribute
+    # Yields the attribute and the error for that attribute. If the attribute
     # has more than one error message, yields once for each error message.
     #
     #   p.errors.add(:name, "can't be blank")

activemodel/lib/active_model/observer_array.rb

@@ -15,7 +15,7 @@ def disabled_for?(observer)
       disabled_observers.include?(observer.class)
     end
 
-    # Disables one or more observers.  This supports multiple forms:
+    # Disables one or more observers. This supports multiple forms:
     #
     #   ORM.observers.disable :user_observer
     #     # => disables the UserObserver
@@ -38,7 +38,7 @@ def disable(*observers, &block)
       set_enablement(false, observers, &block)
     end
 
-    # Enables one or more observers.  This supports multiple forms:
+    # Enables one or more observers. This supports multiple forms:
     #
     #   ORM.observers.enable :user_observer
     #     # => enables the UserObserver
@@ -59,7 +59,7 @@ def disable(*observers, &block)
     #     # just the duration of the block
     #   end
     #
-    # Note: all observers are enabled by default.  This method is only
+    # Note: all observers are enabled by default. This method is only
     # useful when you have previously disabled one or more observers.
     def enable(*observers, &block)
       set_enablement(true, observers, &block)

activemodel/lib/active_model/serialization.rb

@@ -31,7 +31,7 @@ module ActiveModel
   # you want to serialize and their current value.
   #
   # Most of the time though, you will want to include the JSON or XML
-  # serializations.  Both of these modules automatically include the
+  # serializations. Both of these modules automatically include the
   # ActiveModel::Serialization module, so there is no need to explicitly
   # include it.
   #

activemodel/lib/active_model/serializers/xml.rb

@@ -55,10 +55,10 @@ def initialize(serializable, options = nil)
         end
 
         # To replicate the behavior in ActiveRecord#attributes, <tt>:except</tt>
-        # takes precedence over <tt>:only</tt>.  If <tt>:only</tt> is not set
+        # takes precedence over <tt>:only</tt>. If <tt>:only</tt> is not set
         # for a N level model but is set for the N+1 level models,
         # then because <tt>:except</tt> is set to a default value, the second
-        # level model can have both <tt>:except</tt> and <tt>:only</tt> set.  So if
+        # level model can have both <tt>:except</tt> and <tt>:only</tt> set. So if
         # <tt>:only</tt> is set, always delete <tt>:except</tt>.
         def attributes_hash
           attributes = @serializable.attributes

activemodel/lib/active_model/validations.rb

@@ -81,7 +81,7 @@ module ClassMethods
       #   proc or string should return or evaluate to a true or false value.
       # * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
       #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or
-      #   <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).  The
+      #   <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       def validates_each(*attr_names, &block)
         options = attr_names.extract_options!.symbolize_keys

activemodel/lib/active_model/validations/acceptance.rb

@@ -49,7 +49,7 @@ module HelperMethods
       #   before validation.
       # * <tt>:if</tt> - Specifies a method, proc or string to call to determine
       #   if the validation should occur (e.g. <tt>:if => :allow_validation</tt>,
-      #   or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).  The
+      #   or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false
       #   value.
       # * <tt>:unless</tt> - Specifies a method, proc or string to call to

activemodel/lib/active_model/validations/confirmation.rb

@@ -50,7 +50,7 @@ module HelperMethods
       #   and <tt>:update</tt>.
       # * <tt>:if</tt> - Specifies a method, proc or string to call to determine
       #   if the validation should occur (e.g. <tt>:if => :allow_validation</tt>,
-      #   or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).  The
+      #   or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false
       #   value.
       # * <tt>:unless</tt> - Specifies a method, proc or string to call to

activemodel/lib/active_model/validations/exclusion.rb

@@ -54,10 +54,10 @@ module HelperMethods
       #   validation contexts by default (+nil+), other options are <tt>:create</tt>
       #   and <tt>:update</tt>.
       # * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).  The
+      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       # * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).  The
+      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       def validates_exclusion_of(*attr_names)
         validates_with ExclusionValidator, _merge_attributes(attr_names)

activemodel/lib/active_model/validations/format.rb

@@ -79,10 +79,10 @@ module HelperMethods
       #   validation contexts by default (+nil+), other options are <tt>:create</tt>
       #   and <tt>:update</tt>.
       # * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).  The
+      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       # * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).  The
+      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       def validates_format_of(*attr_names)
         validates_with FormatValidator, _merge_attributes(attr_names)

activemodel/lib/active_model/validations/inclusion.rb

@@ -54,10 +54,10 @@ module HelperMethods
       #   validation contexts by default (+nil+), other options are <tt>:create</tt>
       #   and <tt>:update</tt>.
       # * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).  The
+      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       # * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).  The
+      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       def validates_inclusion_of(*attr_names)
         validates_with InclusionValidator, _merge_attributes(attr_names)

activemodel/lib/active_model/validations/length.rb

@@ -83,15 +83,15 @@ module HelperMethods
       # * <tt>:too_long</tt> - The error message if the attribute goes over the maximum (default is: "is too long (maximum is %{count} characters)").
       # * <tt>:too_short</tt> - The error message if the attribute goes under the minimum (default is: "is too short (min is %{count} characters)").
       # * <tt>:wrong_length</tt> - The error message if using the <tt>:is</tt> method and the attribute is the wrong size (default is: "is the wrong length (should be %{count} characters)").
-      # * <tt>:message</tt> - The error message to use for a <tt>:minimum</tt>, <tt>:maximum</tt>, or <tt>:is</tt> violation.  An alias of the appropriate <tt>too_long</tt>/<tt>too_short</tt>/<tt>wrong_length</tt> message.
+      # * <tt>:message</tt> - The error message to use for a <tt>:minimum</tt>, <tt>:maximum</tt>, or <tt>:is</tt> violation. An alias of the appropriate <tt>too_long</tt>/<tt>too_short</tt>/<tt>wrong_length</tt> message.
       # * <tt>:on</tt> - Specifies when this validation is active. Runs in all
       #   validation contexts by default (+nil+), other options are <tt>:create</tt>
       #   and <tt>:update</tt>.
       # * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).  The
+      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       # * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).  The
+      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       # * <tt>:tokenizer</tt> - Specifies how to split up the attribute string. (e.g. <tt>:tokenizer => lambda {|str| str.scan(/\w+/)}</tt> to
       #   count words as in above example.)

activemodel/lib/active_model/validations/numericality.rb

@@ -102,10 +102,10 @@ module HelperMethods
       # * <tt>:odd</tt> - Specifies the value must be an odd number.
       # * <tt>:even</tt> - Specifies the value must be an even number.
       # * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>).  The
+      #   occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       # * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
-      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).  The
+      #   not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
       #   method, proc or string should return or evaluate to a true or false value.
       #
       # The following checks can also be supplied with a proc or a symbol which corresponds to a method: