code: def end_step(self, lineno, timestamp=None, result_code=None):
          
          self.state = self.STATES['step_finished']
          step_errors = self.sub_parser.get_artifact()
          step_error_count = len(step_errors)
          if step_error_count > settings.PARSER_MAX_STEP_ERROR_LINES:
              step_errors = step_errors[:settings.PARSER_MAX_STEP_ERROR_LINES]
              self.artifact["errors_truncated"] = True
          self.current_step.update({
              "finished": timestamp,
              "finished_linenumber": lineno,
              # Whilst the result code is present on both the start and end buildbot-style step
              # markers, for Taskcluster logs the start marker line lies about the result, since
              # the log output is unbuffered, so Taskcluster does not know the real result at
              # that point. As such, we only set the result when ending a step.
              "result": self.RESULT_DICT.get(result_code, "unknown"),
              "errors": step_errors
          })
          # reset the sub_parser for the next step
          self.sub_parser.clear()
docs: Fill in the current step's summary and update the state to show the current step has ended.