Refactor to use each_key, remove extra spaces

activerecord/CHANGELOG.md

@@ -601,7 +601,7 @@
 
     *Matt Jones*
 
-*   Accept belongs_to (including polymorphic) association keys in queries.
+*   Accept `belongs_to` (including polymorphic) association keys in queries.
 
     The following queries are now equivalent:
 

activerecord/lib/active_record/associations/join_dependency.rb

@@ -68,7 +68,7 @@ def remove_duplicate_results!(base, records, associations)
             remove_duplicate_results!(base, records, association)
           end
         when Hash
-          associations.keys.each do |name|
+          associations.each_key do |name|
             reflection = base.reflections[name]
             remove_uniq_by_reflection(reflection, records)
 

activerecord/lib/active_record/querying.rb

-
 module ActiveRecord
   module Querying
     delegate :find, :take, :take!, :first, :first!, :last, :last!, :exists?, :any?, :many?, :to => :all

activerecord/lib/active_record/reflection.rb

-
 module ActiveRecord
   # = Active Record Reflection
   module Reflection # :nodoc:

activerecord/lib/active_record/scoping.rb

-
 module ActiveRecord
   module Scoping
     extend ActiveSupport::Concern
@@ -25,6 +24,5 @@ def populate_with_current_scope_attributes
         send("#{att}=", value) if respond_to?("#{att}=")
       end
     end
-
   end
 end

activerecord/lib/active_record/scoping/default.rb

-
 module ActiveRecord
   module Scoping
     module Default
@@ -99,7 +98,7 @@ def default_scope(scope = nil)
             )
           end
 
-          self.default_scopes = default_scopes + [scope]
+          self.default_scopes += [scope]
         end
 
         def build_default_scope # :nodoc:
@@ -140,7 +139,6 @@ def evaluate_default_scope # :nodoc:
             self.ignore_default_scope = false
           end
         end
-
       end
     end
   end