(command.CommandList
  children: [
    (command.Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (lhs_expr.LhsName name:test_description)
          op: Equal
          rhs: {(SQ <'merge can handle submodules'>)}
        )
      ]
    )
    (C {(.)} {(./test-lib.sh)})
    (C {(.)} {(DQ ($ VSub_DollarName '$TEST_DIRECTORY')) (/lib-submodule-update.sh)})
    (C {(test_submodule_switch)} {(DQ ('git merge'))})
    (C {(test_submodule_switch)} {(DQ ('git merge --ff'))})
    (C {(test_submodule_switch)} {(DQ ('git merge --ff-only'))})
    (command.Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (lhs_expr.LhsName name:KNOWN_FAILURE_NOFF_MERGE_DOESNT_CREATE_EMPTY_SUBMODULE_DIR)
          op: Equal
          rhs: {(1)}
        )
      ]
    )
    (command.Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: 
            (lhs_expr.LhsName
              name: KNOWN_FAILURE_NOFF_MERGE_ATTEMPTS_TO_MERGE_REMOVED_SUBMODULE_FILES
            )
          op: Equal
          rhs: {(1)}
        )
      ]
    )
    (C {(test_submodule_switch)} {(DQ ('git merge --no-ff'))})
    (C {(test_done)})
  ]
)