(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: {(SQ <"Peter MacMillan">)}
          spids: [4]
        )
      ]
      spids: [4]
    )
    (C {(.)} {(./test-lib.sh)})
    (C {(test_expect_success)} {(setup)} 
      {
        (SQ <"\n"> <"\techo Hello >file &&\n"> <"\tgit add file &&\n"> <"\ttest_tick &&\n"> 
          <"\tgit commit -m V1 &&\n"> <"\techo Hello world >file &&\n"> <"\tgit add file &&\n"> <"\tgit checkout -b other\n">
        )
      }
    )
    (C {(test_expect_success)} {(SQ <"check all changes are staged">)} 
      {(SQ <"\n"> <"\tgit diff --exit-code\n">)}
    )
    (C {(test_expect_success)} {(SQ <"second commit">)} {(SQ <"\n"> <"\tgit commit -m V2\n">)})
    (C {(test_expect_success)} {(SQ <check>)} {(SQ <"\n"> <"\tgit diff --cached --exit-code\n">)})
    (C {(test_done)})
  ]
)