(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:test_description)
          op: assign_op.Equal
          rhs: {(SQ <'diff honors config option, diff.suppressBlankEmpty'>)}
          spids: [12]
        )
      ]
    )
    (C {<.>} {<'./test-lib.sh'>})
    (command.AndOr
      ops: [Id.Op_DPipe]
      children: [
        (command.Simple
          words: [{<cat>}]
          redirects: [
            (redir
              op: <Id.Redir_DLess '<<'>
              loc: (redir_loc.Fd fd:0)
              arg: 
                (redir_param.HereDoc
                  here_begin: {(word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\E'>) <OF>}
                  here_end_span_id: 43
                  stdin_parts: [
                    <'diff --git a/f b/f\n'>
                    <'index 5f6a263..8cb8bae 100644\n'>
                    <'--- a/f\n'>
                    <'+++ b/f\n'>
                    <'@@ -1,2 +1,2 @@\n'>
                    <'\n'>
                    <'-x\n'>
                    <'+y\n'>
                  ]
                )
            )
            (redir op:<Id.Redir_Great '>'> loc:(redir_loc.Fd fd:1) arg:{<exp>})
          ]
          do_fork: T
        )
        (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
      ]
    )
    (C {<test_expect_success>} {(DQ ($ Id.VSub_DollarName '$test_description'))} 
      {
        (SQ <'printf "\\nx\\n" > f &&\n'> <'     git add f &&\n'> <'     git commit -q -m. f &&\n'> 
          <'     printf "\\ny\\n" > f &&\n'> <'     git config --bool diff.suppressBlankEmpty true &&\n'> <'     git diff f > actual &&\n'> 
          <'     test_cmp exp actual &&\n'> <'     perl -i.bak -p -e "s/^\\$/ /" exp &&\n'> 
          <'     git config --bool diff.suppressBlankEmpty false &&\n'> <'     git diff f > actual &&\n'> <'     test_cmp exp actual &&\n'> 
          <'     git config --bool --unset diff.suppressBlankEmpty &&\n'> <'     git diff f > actual &&\n'> <'     test_cmp exp actual\n'> <'     '>
        )
      }
    )
    (C {<test_done>})
  ]
)