docs: def step_i_run_command(context, command):
      """
      Run a command as subprocess, collect its output and returncode.
      """
      command_util.ensure_workdir_exists(context)
      context.command_result = command_shell.run(command, cwd=context.workdir)
      command_util.workdir_save_coverage_files(context.workdir)
      if False and DEBUG:
          print(u"run_command: {0}".format(command))
          print(u"run_command.output {0}".format(context.command_result.output))