OrderedHash#each* methods return self like Hash does [#6364 state:resolved]

Signed-off-by: Santiago Pastorino <santiago@wyeworks.com>

activesupport/lib/active_support/ordered_hash.rb

@@ -138,14 +138,17 @@ def to_a
 
       def each_key
         @keys.each { |key| yield key }
+        self
       end
 
       def each_value
         @keys.each { |key| yield self[key]}
+        self
       end
 
       def each
         @keys.each {|key| yield [key, self[key]]}
+        self
       end
 
       alias_method :each_pair, :each

activesupport/test/ordered_hash_test.rb

@@ -78,19 +78,19 @@ def test_has_value
 
   def test_each_key
     keys = []
-    @ordered_hash.each_key { |k| keys << k }
+    assert_equal @ordered_hash, @ordered_hash.each_key { |k| keys << k }
     assert_equal @keys, keys
   end
 
   def test_each_value
     values = []
-    @ordered_hash.each_value { |v| values << v }
+    assert_equal @ordered_hash, @ordered_hash.each_value { |v| values << v }
     assert_equal @values, values
   end
 
   def test_each
     values = []
-    @ordered_hash.each {|key, value| values << value}
+    assert_equal @ordered_hash, @ordered_hash.each {|key, value| values << value}
     assert_equal @values, values
   end