docs: def parse(self, parser):
          """Main method to render data into the template."""
          lineno = next(parser.stream).lineno
  
          if parser.stream.skip_if('name:short'):
              parser.stream.skip(1)
              short = parser.parse_expression()
          else:
              short = nodes.Const(False)
  
          result = self.call_method('_commit_hash', [short], [], lineno=lineno)
          return nodes.Output([result], lineno=lineno)