6 files changed, 4 insertions, 10 deletions
diff --git a/activerecord/lib/active_record/associations/join_dependency.rb b/activerecord/lib/active_record/associations/join_dependency.rb
index cd366ac8b7..f40368cfeb 100644
--- a/activerecord/lib/active_record/associations/join_dependency.rb
+++ b/activerecord/lib/active_record/associations/join_dependency.rb
@@ -68,7 +68,7 @@ module ActiveRecord
             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)
 
diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb
index 1b2aa9349e..803cae7115 100644
--- a/activerecord/lib/active_record/persistence.rb
+++ b/activerecord/lib/active_record/persistence.rb
@@ -220,7 +220,7 @@ module ActiveRecord
         save
       end
     end
-    
+
     alias update_attributes update
 
     # Updates its receiver just like +update+ but calls <tt>save!</tt> instead
@@ -233,7 +233,7 @@ module ActiveRecord
         save!
       end
     end
-    
+
     alias update_attributes! update!
 
     # Equivalent to <code>update_columns(name => value)</code>.
diff --git a/activerecord/lib/active_record/querying.rb b/activerecord/lib/active_record/querying.rb
index 5ddcaee6be..f08b9c614d 100644
--- a/activerecord/lib/active_record/querying.rb
+++ b/activerecord/lib/active_record/querying.rb
@@ -1,4 +1,3 @@
-
 module ActiveRecord
   module Querying
     delegate :find, :take, :take!, :first, :first!, :last, :last!, :exists?, :any?, :many?, :to => :all
diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb
index bcfcb061f2..0995750ecd 100644
--- a/activerecord/lib/active_record/reflection.rb
+++ b/activerecord/lib/active_record/reflection.rb
@@ -1,4 +1,3 @@
-
 module ActiveRecord
   # = Active Record Reflection
   module Reflection # :nodoc:
diff --git a/activerecord/lib/active_record/scoping.rb b/activerecord/lib/active_record/scoping.rb
index 0c3fd1bd29..9746b1c3c2 100644
--- a/activerecord/lib/active_record/scoping.rb
+++ b/activerecord/lib/active_record/scoping.rb
@@ -1,4 +1,3 @@
-
 module ActiveRecord
   module Scoping
     extend ActiveSupport::Concern
@@ -25,6 +24,5 @@ module ActiveRecord
         send("#{att}=", value) if respond_to?("#{att}=")
       end
     end
-
   end
 end
diff --git a/activerecord/lib/active_record/scoping/default.rb b/activerecord/lib/active_record/scoping/default.rb
index 6835d0e01b..5bd481082e 100644
--- a/activerecord/lib/active_record/scoping/default.rb
+++ b/activerecord/lib/active_record/scoping/default.rb
@@ -1,4 +1,3 @@
-
 module ActiveRecord
   module Scoping
     module Default
@@ -99,7 +98,7 @@ module ActiveRecord
             )
           end
 
-          self.default_scopes = default_scopes + [scope]
+          self.default_scopes += [scope]
         end
 
         def build_default_scope # :nodoc:
@@ -140,7 +139,6 @@ module ActiveRecord
             self.ignore_default_scope = false
           end
         end
-
       end
     end
   end