old_contents: from configargparse import DefaultConfigFileParser
  
  
  class CustomConfigFileParser(DefaultConfigFileParser):
      def get_syntax_description(self):
          """
          Overwrite string to avoid printing goo.gl URL
          """
          msg = ("Config file syntax allows: key=value, flag=true, stuff=[a,b,c] "
                 "(for details, see syntax at https://pypi.org/project/ConfigArgParse/).")
          return msg
  
      ...
  
new_contents: from configargparse import DefaultConfigFileParser
  
  
  class CustomConfigFileParser(DefaultConfigFileParser):
      def get_syntax_description(self):
          """
          Overwrite string to avoid printing goo.gl URL
          """
          msg = ("Config file syntax allows: key=value, flag=true, stuff=[a,b,c] "
                 "(for details, see syntax at https://pypi.org/project/ConfigArgParse/).")
          return msg
  
subject: remove useless line