1 files changed, 4 insertions, 4 deletions
diff --git a/activesupport/lib/active_support/core_ext/hash/keys.rb b/activesupport/lib/active_support/core_ext/hash/keys.rb
index f4105f66b0..9297a59c46 100644
--- a/activesupport/lib/active_support/core_ext/hash/keys.rb
+++ b/activesupport/lib/active_support/core_ext/hash/keys.rb
@@ -31,13 +31,13 @@ class Hash
   #   hash.stringify_keys
   #   # => {"name"=>"Rob", "age"=>"28"}
   def stringify_keys
-    transform_keys{ |key| key.to_s }
+    transform_keys(&:to_s)
   end
 
   # Destructively convert all keys to strings. Same as
   # +stringify_keys+, but modifies +self+.
   def stringify_keys!
-    transform_keys!{ |key| key.to_s }
+    transform_keys!(&:to_s)
   end
 
   # Returns a new hash with all keys converted to symbols, as long as
@@ -105,14 +105,14 @@ class Hash
   #   hash.deep_stringify_keys
   #   # => {"person"=>{"name"=>"Rob", "age"=>"28"}}
   def deep_stringify_keys
-    deep_transform_keys{ |key| key.to_s }
+    deep_transform_keys(&:to_s)
   end
 
   # Destructively convert all keys to strings.
   # This includes the keys from the root hash and from all
   # nested hashes and arrays.
   def deep_stringify_keys!
-    deep_transform_keys!{ |key| key.to_s }
+    deep_transform_keys!(&:to_s)
   end
 
   # Returns a new hash with all keys converted to symbols, as long as