[ci skip] Correct output of Hash#symbolize_keys

Author: Akshay Vishnoi

activesupport/lib/active_support/core_ext/hash/keys.rb

@@ -27,7 +27,7 @@ def transform_keys!
   #   hash = { name: 'Rob', age: '28' }
   #
   #   hash.stringify_keys
-  #   # => { "name" => "Rob", "age" => "28" }
+  #   # => {"name"=>"Rob", "age"=>"28"}
   def stringify_keys
     transform_keys{ |key| key.to_s }
   end
@@ -44,7 +44,7 @@ def stringify_keys!
   #   hash = { 'name' => 'Rob', 'age' => '28' }
   #
   #   hash.symbolize_keys
-  #   # => { name: "Rob", age: "28" }
+  #   # => {:name=>"Rob", :age=>"28"}
   def symbolize_keys
     transform_keys{ |key| key.to_sym rescue key }
   end