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                  spids: [7]
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        (command.Sentence
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                (assign_pair
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                  spids: [12]
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          terminator: (Token id:Id.Op_Semi val:';' span_id:15)
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        (command.Sentence
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                (assign_pair
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        )
        (command.ShAssignment
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              op: assign_op.Equal
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              spids: [21]
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      ]
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                              spids: [55]
                            )
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                      terminator: (Token id:Id.Op_Semi val:';' span_id:59)
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                              terminator: (Token id:Id.Op_Semi val:';' span_id:82)
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                                  (DQ ($ Id.VSub_Number '$0') 
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                          spids: [106]
                        )
                      ]
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                  spids: [64 66 109 -1]
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                                  {(DQ ($ Id.VSub_DollarName '$user'))} {(Id.Lit_RBracket ']')}
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                              terminator: (Token id:Id.Op_Semi val:';' span_id:130)
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                                  (DQ ($ Id.VSub_Number '$0') 
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                              redirects: [
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                            (command.ControlFlow
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                          spids: [116 132]
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                          spids: [154]
                        )
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                  spids: [112 114 157 -1]
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                            )
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                      terminator: (Token id:Id.Op_Semi val:';' span_id:166)
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                  spids: [160 162 168 -1]
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                        {
                          (DQ ('Usage: ') ($ Id.VSub_Number '$0') 
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                        }
                      ]
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                    (command.Simple
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                          (DQ ('Default niceval change is ') 
                            (word_part.EscapedLiteral
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                            (word_part.EscapedLiteral
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                          )
                        }
                      ]
                      redirects: [
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                        {(DQ ('priority, minus is higher, but only root can go below 0)'))}
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                  (DQ ('Usage: ') ($ Id.VSub_Number '$0') 
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                                      (DQ ('/ ') ($ Id.VSub_Number '$1') ('/ { print ') 
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                      (DQ ($ Id.VSub_Number '$0') (': no processes match pattern ') 
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                (DQ ($ Id.VSub_Number '$0') (': more than one process matches pattern ') 
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                                (suffix_op.Unary
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            (command.Pipeline
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                )
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              negated: F
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            (C {(echo)} {(DQ ('Use -u user or -t tty to narrow down your selection criteria.'))})
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          spids: [425 453]
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        (if_arm
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              terminator: (Token id:Id.Op_Semi val:';' span_id:587)
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          action: [(C {(echo)} {($ Id.VSub_DollarName '$pid')})]
          spids: [575 589]
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            (DQ ('Renicing job ') 
              (word_part.EscapedLiteral
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                        (C {(sed)} {(SQ (Token id:Id.Lit_Chars val:'s/ [ ]*/ /g' span_id:629))})
                        (C {(tail)} {(-1)})
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                          } {(-f6-)}
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                      negated: F
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                  ]
                )
            )
          }
        )
        (C {(echo)} 
          {
            (DQ (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\"' span_id:652)) 
              (' (') ($ Id.VSub_DollarName '$pid') (')')
            )
          }
        )
        (C {(renice)} {($ Id.VSub_DollarName '$niceval')} {($ Id.VSub_DollarName '$pid')})
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    )
    (command.ControlFlow token:(Token id:Id.ControlFlow_Exit val:exit span_id:668) arg_word:{(0)})
  ]
)