docs: def edit(self):
          """
          Edit file with default os application.
          """
          if platform.system().lower() == 'windows':
              os.startfile(str(self.config_file))
          else:
              if platform.system().lower() == 'darwin':
                  call = 'open'
              else:
                  call = 'xdg-open'
              subprocess.call([call, self.config_file])