(command.CommandList
  children: [
    (C {<set>} {<-e>})
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:std)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number '$1')}
          spids: [54]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:CC)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number '$2')}
          spids: [57]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:expected_list)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number '$3')}
          spids: [60]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:all_data_files)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number '$4')}
          spids: [63]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:new_list)
          op: assign_op.Equal
          rhs: (word.Empty)
          spids: [67]
        )
      ]
    )
    (command.ForEach
      iter_name: f
      iter_words: [{($ Id.VSub_DollarName '$all_data_files')}]
      do_arg_iter: F
      body: 
        (command.DoGroup
          children: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:h)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (braced_var_sub
                        token: <Id.VSub_Name f>
                        suffix_op: 
                          (suffix_op.Unary
                            tok: <Id.VOp1_Pound '#'>
                            arg_word: {<data> <Id.Lit_Slash '/'>}
                          )
                      )
                    }
                  spids: [82]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:h)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (braced_var_sub
                        token: <Id.VSub_Name h>
                        suffix_op: (suffix_op.Unary tok:<Id.VOp1_Percent '%'> arg_word:{<-data>})
                      )
                    }
                  spids: [91]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:exp)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (command_sub
                        left_token: <Id.Left_DollarParen '$('>
                        child: 
                          (command.Pipeline
                            children: [
                              (C {($ Id.VSub_DollarName '$CC')} {<-D> ($ Id.VSub_DollarName '$std')} 
                                {<-x>} {<c>} {<-E>} {($ Id.VSub_DollarName '$f')}
                              )
                              (C {<sed>} {<-e>} {(SQ <'/^#/d'>)} {<-e>} {(SQ <'/^[ \t]*$/d'>)})
                            ]
                            negated: F
                          )
                      )
                    }
                  spids: [99]
                )
              ]
            )
            (command.If
              arms: [
                (if_arm
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (C {<Id.Lit_LBracket '['>} {(DQ ($ Id.VSub_DollarName '$exp'))} 
                              {<Id.Lit_RBracket ']'>}
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:new_list)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (DQ ($ Id.VSub_DollarName '$new_list') <' '> ($ Id.VSub_DollarName '$h'))
                            }
                          spids: [146]
                        )
                      ]
                    )
                  ]
                  spids: [132 143]
                )
              ]
            )
          ]
        )
    )
    (C {<echo>} 
      {
        (DQ <'Headers with expectations for '> ($ Id.VSub_DollarName '$std') <': '> 
          ($ Id.VSub_DollarName '$new_list')
        )
      }
    )
    (C {<echo>} {(DQ <'Expected list: '> ($ Id.VSub_DollarName '$expected_list'))})
    (command.ShAssignment
      pairs: [(assign_pair lhs:(sh_lhs_expr.Name name:rc) op:assign_op.Equal rhs:{<0>} spids:[176])]
    )
    (command.ForEach
      iter_name: h
      iter_words: [{($ Id.VSub_DollarName '$expected_list')}]
      do_arg_iter: F
      body: 
        (command.DoGroup
          children: [
            (command.Case
              to_match: {(DQ <' '> ($ Id.VSub_DollarName '$new_list') <' '>)}
              arms: [
                (case_arm
                  pat_list: [
                    {<Id.Lit_Star '*'> (DQ <' '> ($ Id.VSub_DollarName '$h') <' '>) <Id.Lit_Star '*'>}
                  ]
                  spids: [203 211 214 -1]
                )
                (case_arm
                  pat_list: [{<Id.Lit_Star '*'>}]
                  action: [
                    (C {<echo>} {(DQ <'Missing expectations for '> ($ Id.VSub_DollarName '$h') <.>)})
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:rc)
                          op: assign_op.Equal
                          rhs: {<1>}
                          spids: [231]
                        )
                      ]
                    )
                  ]
                  spids: [217 219 235 -1]
                )
              ]
            )
          ]
        )
    )
    (command.ForEach
      iter_name: h
      iter_words: [{($ Id.VSub_DollarName '$new_list')}]
      do_arg_iter: F
      body: 
        (command.DoGroup
          children: [
            (command.Case
              to_match: {(DQ <' '> ($ Id.VSub_DollarName '$expected_list') <' '>)}
              arms: [
                (case_arm
                  pat_list: [
                    {<Id.Lit_Star '*'> (DQ <' '> ($ Id.VSub_DollarName '$h') <' '>) <Id.Lit_Star '*'>}
                  ]
                  spids: [266 274 277 -1]
                )
                (case_arm
                  pat_list: [{<Id.Lit_Star '*'>}]
                  action: [
                    (C {<echo>} {(DQ <'Spurious expectations for '> ($ Id.VSub_DollarName '$h') <.>)})
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:rc)
                          op: assign_op.Equal
                          rhs: {<1>}
                          spids: [294]
                        )
                      ]
                    )
                  ]
                  spids: [280 282 298 -1]
                )
              ]
            )
          ]
        )
    )
    (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{($ Id.VSub_DollarName '$rc')})
  ]
)