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    (command.CommandList
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                (assign_pair
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        (command.Sentence
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                (assign_pair
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        (command.Sentence
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                )
              ]
            )
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        (command.ShAssignment
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          ]
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    )
    (command.CommandList
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                (assign_pair
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                  spids: [50]
                )
              ]
            )
          terminator: <Id.Op_Semi _>
        )
        (command.Sentence
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                (assign_pair
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                  op: assign_op.Equal
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                  spids: [57]
                )
              ]
            )
          terminator: <Id.Op_Semi _>
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        (command.ShAssignment
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            (assign_pair
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              op: assign_op.Equal
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          ]
        )
      ]
    )
    (command.ForEach
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      do_arg_iter: T
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                        )
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.Case
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                      arms: [
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                                (assign_pair
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                                  op: assign_op.Equal
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                                    {
                                      (DQ 
                                        (command_sub
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                                          child: 
                                            (command.Pipeline
                                              children: [
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                                                (C {<sed>} {(SQ <'s/\\.Z$//'>)})
                                              ]
                                              negated: F
                                            )
                                        )
                                      )
                                    }
                                  spids: [130]
                                )
                              ]
                            )
                            (command.ShAssignment
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                                  lhs: (sh_lhs_expr.Name name:Zlist)
                                  op: assign_op.Equal
                                  rhs: 
                                    {
                                      (DQ ($ Id.VSub_DollarName '$Zlist') <' '> 
                                        (word_part.EscapedLiteral
                                          token: <Id.Lit_EscapedChar '\\"'>
                                        ) ($ Id.VSub_DollarName '$arg') (word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\"'>)
                                      )
                                    }
                                  spids: [148]
                                )
                              ]
                            )
                          ]
                          spids: [119 121 158 -1]
                        )
                        (case_arm
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                          action: [
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                            (command.ShAssignment
                              pairs: [
                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:arg)
                                  op: assign_op.Equal
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                                    {
                                      (DQ 
                                        (command_sub
                                          left_token: <Id.Left_DollarParen '$('>
                                          child: 
                                            (command.Pipeline
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                                              ]
                                              negated: F
                                            )
                                        )
                                      )
                                    }
                                  spids: [173]
                                )
                              ]
                            )
                            (command.ShAssignment
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                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:gzlist)
                                  op: assign_op.Equal
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                                    {
                                      (DQ ($ Id.VSub_DollarName '$gzlist') <' '> 
                                        (word_part.EscapedLiteral
                                          token: <Id.Lit_EscapedChar '\\"'>
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                                      )
                                    }
                                  spids: [191]
                                )
                              ]
                            )
                          ]
                          spids: [162 164 201 -1]
                        )
                        (case_arm
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                          action: [
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                            (command.ShAssignment
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                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:arg)
                                  op: assign_op.Equal
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                                    {
                                      (DQ 
                                        (command_sub
                                          left_token: <Id.Left_DollarParen '$('>
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                                              children: [
                                                (C {<echo>} {($ Id.VSub_DollarName '$arg')})
                                                (C {<sed>} {(SQ <'s/\\.bz2$//'>)})
                                              ]
                                              negated: F
                                            )
                                        )
                                      )
                                    }
                                  spids: [216]
                                )
                              ]
                            )
                            (command.ShAssignment
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                                        (word_part.EscapedLiteral
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                                      )
                                    }
                                  spids: [234]
                                )
                              ]
                            )
                          ]
                          spids: [205 207 244 -1]
                        )
                      ]
                    )
                  ]
                  spids: [93 107]
                )
              ]
            )
            (command.ShAssignment
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                      (DQ 
                        (braced_var_sub
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                        (word_part.EscapedLiteral
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                        )
                      )
                    }
                  spids: [254]
                )
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        )
    )
    (command.Case
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          action: [(C {<eval>} {<cat>} {($ Id.VSub_DollarName '$newargs')})]
          spids: [278 282 290 -1]
        )
        (case_arm
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          action: [(C {<eval>} {<more>} {($ Id.VSub_DollarName '$newargs')})]
          spids: [293 297 305 -1]
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          action: [(C {<eval>} {<grep>} {($ Id.VSub_DollarName '$newargs')})]
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        )
        (case_arm
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          action: [
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                (command.Simple
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                    {<echo>}
                    {(DQ ($ Id.VSub_Number '$0') <': unknown base name. Can\'t proceed.'>)}
                  ]
                  redirects: [(redir op:<Id.Redir_GreatAnd '>&'> loc:(redir_loc.Fd fd:1) arg:{<2>})]
                  do_fork: T
                )
              terminator: <Id.Op_Semi _>
            )
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
          spids: [323 325 -1 342]
        )
      ]
    )
    (command.If
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                )
              terminator: <Id.Op_Semi _>
            )
          ]
          action: [(C {<eval>} {($ Id.VSub_DollarName '$Z')} {($ Id.VSub_DollarName '$Zlist')})]
          spids: [349 365]
        )
      ]
    )
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              terminator: <Id.Op_Semi _>
            )
          ]
          action: [(C {<eval>} {($ Id.VSub_DollarName '$gz')} {($ Id.VSub_DollarName '$gzlist')})]
          spids: [376 391]
        )
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    )
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            )
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          action: [(C {<eval>} {($ Id.VSub_DollarName '$bz')} {($ Id.VSub_DollarName '$bzlist')})]
          spids: [402 418]
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      ]
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    (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<0>})
  ]
)