Don't use reserve key of example metadata when initialize
Don't use reserve key of example metadata when initialize

     RuntimeError:
       **************************************************
       :file_path is not allowed

       RSpec reserves some hash keys for its own internal use,
       including :file_path, which is used on:

         /path/to/turnip_formatter/spec/support/example_helper.rb:22:in `base_example'.

       Here are all of RSpec's reserved hash keys:

         description
         example_group
         parent_example_group
         execution_result
         file_path
         full_description
         line_number
         location
         block
       **************************************************

JohnBat26/turnip_formatter,JohnBat26/turnip_formatter,gongo/turnip_formatter,gongo/turnip_formatter,KazuCocoa/turnip_formatter,JohnBat26/turnip_formatter,KazuCocoa/turnip_formatter,gongo/turnip_formatter,KazuCocoa/turnip_formatter