(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: {(SQ <"Test revision walking api">)}
          spids: [13]
        )
      ]
      spids: [13]
    )
    (C {(.)} {(./test-lib.sh)})
    (SimpleCommand
      words: [{(cat)}]
      redirects: [
        (Redir op_id:Redir_Great fd:-1 arg_word:{(run_twice_expected)} spids:[26])
        (HereDoc
          op_id: Redir_DLessDash
          fd: -1
          body: {(DQ ("1st\n") (" > add b\n") (" > add a\n") ("2nd\n") (" > add b\n") (" > add a\n"))}
          do_expansion: True
          here_end: EOF
          was_filled: True
          spids: [29]
        )
      ]
    )
    (C {(test_expect_success)} {(SQ <setup>)} 
      {
        (SQ <"\n"> <"\techo a > a &&\n"> <"\tgit add a &&\n"> <"\tgit commit -m \"add a\" &&\n"> 
          <"\techo b > b &&\n"> <"\tgit add b &&\n"> <"\tgit commit -m \"add b\"\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"revision walking can be done twice">)} 
      {
        (SQ <"\n"> <"\ttest-revision-walking run-twice >run_twice_actual &&\n"> 
          <"\ttest_cmp run_twice_expected run_twice_actual\n">
        )
      }
    )
    (C {(test_done)})
  ]
)