(command.CommandList
  children: [
    (command.ShFunction
      name: columnize
      body: 
        (BraceGroup
          children: [
            (C {<typeset>} {<-i>} 
              {<Id.Lit_VarLike 'displaywidth='> 
                (braced_var_sub
                  token: <Id.VSub_Number 1>
                  suffix_op: (suffix_op.Unary tok:<Id.VTest_ColonHyphen ':-'> arg_word:{<80>})
                )
              }
            )
            (command.AndOr
              ops: [Id.Op_DAmp Id.Op_DPipe]
              children: [
                (command.DParen
                  child: 
                    (arith_expr.Binary
                      op_id: Id.Arith_Less
                      left: {($ Id.VSub_Pound '$#')}
                      right: {<Id.Lit_Digits 2>}
                    )
                )
                (C {<typeset>} {<Id.Lit_VarLike 'colsep='> (SQ <'  '>)})
                (C {<typeset>} {<Id.Lit_VarLike 'colsep='> (DQ ($ Id.VSub_Number '$2'))})
              ]
            )
            (C {<typeset>} {<-i>} 
              {<Id.Lit_VarLike 'list_size='> 
                (braced_var_sub
                  token: <Id.VSub_Name list>
                  prefix_op: (Id.VSub_Pound)
                  bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                )
              }
            )
            (command.If
              arms: [
                (if_arm
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DParen
                              child: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_DEqual
                                  left: <Id.Lit_ArithVarLike list_size>
                                  right: {<Id.Lit_Digits 0>}
                                )
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:columnized)
                          op: assign_op.Equal
                          rhs: {(sh_array_literal left:<Id.Op_LParen _> words:[{(SQ <'<empty>'>)}])}
                          spids: [156]
                        )
                      ]
                    )
                    (command.ControlFlow token:<Id.ControlFlow_Return return>)
                  ]
                  spids: [140 153]
                )
              ]
            )
            (command.If
              arms: [
                (if_arm
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DParen
                              child: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_DEqual
                                  left: {<Id.Lit_Digits 1>}
                                  right: <Id.Lit_ArithVarLike list_size>
                                )
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:columnized)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (sh_array_literal
                                left: <Id.Op_LParen _>
                                words: [
                                  {
                                    (DQ 
                                      (braced_var_sub
                                        token: <Id.VSub_Name list>
                                        bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 0>})
                                      )
                                    )
                                  }
                                ]
                              )
                            }
                          spids: [185]
                        )
                      ]
                    )
                    (command.ControlFlow token:<Id.ControlFlow_Return return>)
                  ]
                  spids: [170 182]
                )
              ]
            )
            (C {<typeset>} {<-i>} {<Id.Lit_VarLike 'nrows='> <0>})
            (C {<typeset>} {<-i>} {<Id.Lit_VarLike 'ncols='> <0>})
            (C {<typeset>} {<-a>} 
              {<Id.Lit_VarLike 'colwidths='> (sh_array_literal left:<Id.Op_LParen _>)}
            )
            (C {<typeset>} {<-i>} {<Id.Lit_VarLike 'i='> <0>})
            (command.ForExpr
              init: 
                (arith_expr.BinaryAssign
                  op_id: Id.Arith_Equal
                  left: <Id.Lit_ArithVarLike i>
                  right: {<Id.Lit_Digits 0>}
                )
              cond: 
                (arith_expr.Binary
                  op_id: Id.Arith_Less
                  left: <Id.Lit_ArithVarLike i>
                  right: <Id.Lit_ArithVarLike list_size>
                )
              update: (arith_expr.UnaryAssign op_id:Id.Node_PostDPlus child:<Id.Lit_ArithVarLike i>)
              body: 
                (command.DoGroup
                  children: [
                    (C {<typeset>} {<-a>} 
                      {<Id.Lit_VarLike 'colwidths='> (sh_array_literal left:<Id.Op_LParen _>)}
                    )
                    (command.DParen
                      child: 
                        (arith_expr.UnaryAssign
                          op_id: Id.Node_PostDPlus
                          child: <Id.Lit_ArithVarLike nrows>
                        )
                    )
                    (command.DParen
                      child: 
                        (arith_expr.BinaryAssign
                          op_id: Id.Arith_Equal
                          left: <Id.Lit_ArithVarLike ncols>
                          right: 
                            (arith_expr.Binary
                              op_id: Id.Arith_Slash
                              left: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_Minus
                                  left: 
                                    (arith_expr.Binary
                                      op_id: Id.Arith_Plus
                                      left: <Id.Lit_ArithVarLike list_size>
                                      right: <Id.Lit_ArithVarLike nrows>
                                    )
                                  right: {<Id.Lit_Digits 1>}
                                )
                              right: <Id.Lit_ArithVarLike nrows>
                            )
                        )
                    )
                    (C {<typeset>} {<-i>} 
                      {<Id.Lit_VarLike 'totwidth='> <-> 
                        (braced_var_sub
                          token: <Id.VSub_Name colsep>
                          prefix_op: (Id.VSub_Pound)
                        )
                      }
                    )
                    (C {<typeset>} {<-i>} {<col>})
                    (command.ForExpr
                      init: 
                        (arith_expr.BinaryAssign
                          op_id: Id.Arith_Equal
                          left: <Id.Lit_ArithVarLike col>
                          right: {<Id.Lit_Digits 0>}
                        )
                      cond: 
                        (arith_expr.Binary
                          op_id: Id.Arith_LessEqual
                          left: <Id.Lit_ArithVarLike col>
                          right: 
                            (arith_expr.Binary
                              op_id: Id.Arith_Minus
                              left: <Id.Lit_ArithVarLike ncols>
                              right: {<Id.Lit_Digits 1>}
                            )
                        )
                      update: 
                        (arith_expr.UnaryAssign
                          op_id: Id.Node_PostDPlus
                          child: <Id.Lit_ArithVarLike col>
                        )
                      body: 
                        (command.DoGroup
                          children: [
                            (command.ShAssignment
                              pairs: [
                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:colwidth)
                                  op: assign_op.Equal
                                  rhs: {<0>}
                                  spids: [366]
                                )
                              ]
                            )
                            (C {<typeset>} {<-i>} {<row>})
                            (command.ForExpr
                              init: 
                                (arith_expr.BinaryAssign
                                  op_id: Id.Arith_Equal
                                  left: <Id.Lit_ArithVarLike row>
                                  right: {<Id.Lit_Digits 0>}
                                )
                              cond: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_LessEqual
                                  left: <Id.Lit_ArithVarLike row>
                                  right: 
                                    (arith_expr.Binary
                                      op_id: Id.Arith_Minus
                                      left: <Id.Lit_ArithVarLike nrows>
                                      right: {<Id.Lit_Digits 1>}
                                    )
                                )
                              update: 
                                (arith_expr.UnaryAssign
                                  op_id: Id.Node_PostDPlus
                                  child: <Id.Lit_ArithVarLike row>
                                )
                              body: 
                                (command.DoGroup
                                  children: [
                                    (C {<typeset>} {<-i>} {<j>})
                                    (command.DParen
                                      child: 
                                        (arith_expr.BinaryAssign
                                          op_id: Id.Arith_Equal
                                          left: <Id.Lit_ArithVarLike j>
                                          right: 
                                            (arith_expr.Binary
                                              op_id: Id.Arith_Plus
                                              left: <Id.Lit_ArithVarLike row>
                                              right: 
                                                (arith_expr.Binary
                                                  op_id: Id.Arith_Star
                                                  left: <Id.Lit_ArithVarLike nrows>
                                                  right: <Id.Lit_ArithVarLike col>
                                                )
                                            )
                                        )
                                    )
                                    (command.If
                                      arms: [
                                        (if_arm
                                          cond: 
                                            (condition.Shell
                                              commands: [
                                                (command.Sentence
                                                  child: 
                                                    (command.DParen
                                                      child: 
                                                        (arith_expr.Binary
                                                          op_id: Id.Arith_GreatEqual
                                                          left: <Id.Lit_ArithVarLike j>
                                                          right: <Id.Lit_ArithVarLike list_size>
                                                        )
                                                    )
                                                  terminator: <Id.Op_Semi _>
                                                )
                                              ]
                                            )
                                          action: [
                                            (command.ControlFlow
                                              token: <Id.ControlFlow_Break break>
                                            )
                                          ]
                                          spids: [429 441]
                                        )
                                      ]
                                    )
                                    (C {<typeset>} 
                                      {<Id.Lit_VarLike 'item='> 
                                        (DQ 
                                          (braced_var_sub
                                            token: <Id.VSub_Name list>
                                            bracket_op: 
                                              (bracket_op.ArrayIndex
                                                expr: <Id.Lit_ArithVarLike j>
                                              )
                                          )
                                        )
                                      }
                                    )
                                    (command.AndOr
                                      ops: [Id.Op_DAmp]
                                      children: [
                                        (command.DParen
                                          child: 
                                            (arith_expr.Binary
                                              op_id: Id.Arith_Less
                                              left: <Id.Lit_ArithVarLike colwidth>
                                              right: 
                                                {
                                                  (braced_var_sub
                                                    token: <Id.VSub_Name item>
                                                    prefix_op: (Id.VSub_Pound)
                                                  )
                                                }
                                            )
                                        )
                                        (command.ShAssignment
                                          pairs: [
                                            (assign_pair
                                              lhs: (sh_lhs_expr.Name name:colwidth)
                                              op: assign_op.Equal
                                              rhs: 
                                                {
                                                  (braced_var_sub
                                                    token: <Id.VSub_Name item>
                                                    prefix_op: (Id.VSub_Pound)
                                                  )
                                                }
                                              spids: [477]
                                            )
                                          ]
                                        )
                                      ]
                                    )
                                  ]
                                )
                            )
                            (command.ShAssignment
                              pairs: [
                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:colwidths)
                                  op: assign_op.PlusEqual
                                  rhs: 
                                    {
                                      (sh_array_literal
                                        left: <Id.Op_LParen _>
                                        words: [{($ Id.VSub_DollarName '$colwidth')}]
                                      )
                                    }
                                  spids: [487]
                                )
                              ]
                            )
                            (command.DParen
                              child: 
                                (arith_expr.BinaryAssign
                                  op_id: Id.Arith_PlusEqual
                                  left: <Id.Lit_ArithVarLike totwidth>
                                  right: 
                                    (arith_expr.Binary
                                      op_id: Id.Arith_Plus
                                      left: <Id.Lit_ArithVarLike colwidth>
                                      right: 
                                        {
                                          (braced_var_sub
                                            token: <Id.VSub_Name colsep>
                                            prefix_op: (Id.VSub_Pound)
                                          )
                                        }
                                    )
                                )
                            )
                            (command.If
                              arms: [
                                (if_arm
                                  cond: 
                                    (condition.Shell
                                      commands: [
                                        (command.Sentence
                                          child: 
                                            (command.DParen
                                              child: 
                                                (arith_expr.Binary
                                                  op_id: Id.Arith_Great
                                                  left: <Id.Lit_ArithVarLike totwidth>
                                                  right: <Id.Lit_ArithVarLike displaywidth>
                                                )
                                            )
                                          terminator: <Id.Op_Semi _>
                                        )
                                      ]
                                    )
                                  action: [(command.ControlFlow token:<Id.ControlFlow_Break break>)]
                                  spids: [508 520]
                                )
                              ]
                            )
                          ]
                        )
                    )
                    (command.If
                      arms: [
                        (if_arm
                          cond: 
                            (condition.Shell
                              commands: [
                                (command.Sentence
                                  child: 
                                    (command.DParen
                                      child: 
                                        (arith_expr.Binary
                                          op_id: Id.Arith_LessEqual
                                          left: <Id.Lit_ArithVarLike totwidth>
                                          right: <Id.Lit_ArithVarLike displaywidth>
                                        )
                                    )
                                  terminator: <Id.Op_Semi _>
                                )
                              ]
                            )
                          action: [(command.ControlFlow token:<Id.ControlFlow_Break break>)]
                          spids: [532 544]
                        )
                      ]
                    )
                  ]
                )
            )
            (command.ForExpr
              init: 
                (arith_expr.BinaryAssign
                  op_id: Id.Arith_Equal
                  left: <Id.Lit_ArithVarLike row>
                  right: {<Id.Lit_Digits 0>}
                )
              cond: 
                (arith_expr.Binary
                  op_id: Id.Arith_Less
                  left: <Id.Lit_ArithVarLike row>
                  right: <Id.Lit_ArithVarLike nrows>
                )
              update: (arith_expr.UnaryAssign op_id:Id.Node_PostDPlus child:<Id.Lit_ArithVarLike row>)
              body: 
                (command.DoGroup
                  children: [
                    (C {<typeset>} {<-i>} {<Id.Lit_VarLike 'text_size='> <0>})
                    (C {<typeset>} {<-a>} 
                      {<Id.Lit_VarLike 'texts='> (sh_array_literal left:<Id.Op_LParen _>)}
                    )
                    (command.ForExpr
                      init: 
                        (arith_expr.BinaryAssign
                          op_id: Id.Arith_Equal
                          left: <Id.Lit_ArithVarLike col>
                          right: {<Id.Lit_Digits 0>}
                        )
                      cond: 
                        (arith_expr.Binary
                          op_id: Id.Arith_Less
                          left: <Id.Lit_ArithVarLike col>
                          right: <Id.Lit_ArithVarLike ncols>
                        )
                      update: 
                        (arith_expr.UnaryAssign
                          op_id: Id.Node_PostDPlus
                          child: <Id.Lit_ArithVarLike col>
                        )
                      body: 
                        (command.DoGroup
                          children: [
                            (command.DParen
                              child: 
                                (arith_expr.BinaryAssign
                                  op_id: Id.Arith_Equal
                                  left: <Id.Lit_ArithVarLike i>
                                  right: 
                                    (arith_expr.Binary
                                      op_id: Id.Arith_Plus
                                      left: <Id.Lit_ArithVarLike row>
                                      right: 
                                        (arith_expr.Binary
                                          op_id: Id.Arith_Star
                                          left: <Id.Lit_ArithVarLike nrows>
                                          right: <Id.Lit_ArithVarLike col>
                                        )
                                    )
                                )
                            )
                            (command.If
                              arms: [
                                (if_arm
                                  cond: 
                                    (condition.Shell
                                      commands: [
                                        (command.Sentence
                                          child: 
                                            (command.DParen
                                              child: 
                                                (arith_expr.Binary
                                                  op_id: Id.Arith_GreatEqual
                                                  left: <Id.Lit_ArithVarLike i>
                                                  right: <Id.Lit_ArithVarLike list_size>
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                                            )
                                          terminator: <Id.Op_Semi _>
                                        )
                                      ]
                                    )
                                  action: [
                                    (command.ShAssignment
                                      pairs: [
                                        (assign_pair
                                          lhs: (sh_lhs_expr.Name name:item)
                                          op: assign_op.Equal
                                          rhs: {(SQ )}
                                          spids: [664]
                                        )
                                      ]
                                    )
                                  ]
                                  spids: [649 661]
                                )
                              ]
                              else_action: [
                                (command.ShAssignment
                                  pairs: [
                                    (assign_pair
                                      lhs: (sh_lhs_expr.Name name:item)
                                      op: assign_op.Equal
                                      rhs: 
                                        {
                                          (DQ 
                                            (braced_var_sub
                                              token: <Id.VSub_Name list>
                                              bracket_op: 
                                                (bracket_op.ArrayIndex
                                                  expr: <Id.Lit_ArithVarLike i>
                                                )
                                            )
                                          )
                                        }
                                      spids: [672]
                                    )
                                  ]
                                )
                              ]
                            )
                            (command.ShAssignment
                              pairs: [
                                (assign_pair
                                  lhs: 
                                    (sh_lhs_expr.IndexedName
                                      name: texts
                                      index: {($ Id.VSub_DollarName '$text_size')}
                                    )
                                  op: assign_op.Equal
                                  rhs: {(DQ ($ Id.VSub_DollarName '$item'))}
                                  spids: [688]
                                )
                              ]
                            )
                            (command.DParen
                              child: 
                                (arith_expr.UnaryAssign
                                  op_id: Id.Node_PostDPlus
                                  child: <Id.Lit_ArithVarLike text_size>
                                )
                            )
                          ]
                        )
                    )
                    (command.WhileUntil
                      keyword: <Id.KW_While while>
                      cond: 
                        (condition.Shell
                          commands: [
                            (command.Sentence
                              child: 
                                (command.AndOr
                                  ops: [Id.Op_DAmp]
                                  children: [
                                    (command.DParen
                                      child: 
                                        (arith_expr.Binary
                                          op_id: Id.Arith_Great
                                          left: <Id.Lit_ArithVarLike text_size>
                                          right: {<Id.Lit_Digits 0>}
                                        )
                                    )
                                    (command.DBracket
                                      expr: 
                                        (bool_expr.Binary
                                          op_id: Id.BoolBinary_GlobDEqual
                                          left: 
                                            {
                                              (braced_var_sub
                                                token: <Id.VSub_Name texts>
                                                bracket_op: 
                                                  (bracket_op.ArrayIndex
                                                    expr: 
                                                      (arith_expr.Binary
                                                        op_id: Id.Arith_Minus
                                                        left: <Id.Lit_ArithVarLike text_size>
                                                        right: {<Id.Lit_Digits 1>}
                                                      )
                                                  )
                                              )
                                            }
                                          right: {(SQ )}
                                        )
                                    )
                                  ]
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                        )
                      body: 
                        (command.DoGroup
                          children: [
                            (command.DParen
                              child: 
                                (arith_expr.UnaryAssign
                                  op_id: Id.Node_PostDMinus
                                  child: <Id.Lit_ArithVarLike text_size>
                                )
                            )
                            (C {<unset>} 
                              {<Id.Lit_ArrayLhsOpen 'texts['> ($ Id.VSub_DollarName '$text_size') 
                                <Id.Lit_RBracket ']'>
                              }
                            )
                          ]
                        )
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:text_row)
                          op: assign_op.Equal
                          rhs: {(SQ )}
                          spids: [764]
                        )
                      ]
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:text_cell)
                          op: assign_op.Equal
                          rhs: {(SQ )}
                          spids: [769]
                        )
                      ]
                    )
                    (command.ForExpr
                      init: 
                        (arith_expr.BinaryAssign
                          op_id: Id.Arith_Equal
                          left: <Id.Lit_ArithVarLike col>
                          right: {<Id.Lit_Digits 0>}
                        )
                      cond: 
                        (arith_expr.Binary
                          op_id: Id.Arith_Less
                          left: <Id.Lit_ArithVarLike col>
                          right: <Id.Lit_ArithVarLike text_size>
                        )
                      update: 
                        (arith_expr.UnaryAssign
                          op_id: Id.Node_PostDPlus
                          child: <Id.Lit_ArithVarLike col>
                        )
                      body: 
                        (command.DoGroup
                          children: [
                            (command.ShAssignment
                              pairs: [
                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:fmt)
                                  op: assign_op.Equal
                                  rhs: 
                                    {
                                      (DQ <'%-'> 
                                        (braced_var_sub
                                          token: <Id.VSub_Name colwidths>
                                          bracket_op: 
                                            (bracket_op.ArrayIndex
                                              expr: <Id.Lit_ArithVarLike col>
                                            )
                                        ) <s>
                                      )
                                    }
                                  spids: [798]
                                )
                              ]
                            )
                            (command.ShAssignment
                              pairs: [
                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:text_cell)
                                  op: assign_op.Equal
                                  rhs: 
                                    {
                                      (command_sub
                                        left_token: <Id.Left_DollarParen '$('>
                                        child: 
                                          (C {<printf>} {($ Id.VSub_DollarName '$fmt')} 
                                            {
                                              (DQ 
                                                (braced_var_sub
                                                  token: <Id.VSub_Name texts>
                                                  bracket_op: 
                                                    (bracket_op.ArrayIndex
                                                      expr: <Id.Lit_ArithVarLike col>
                                                    )
                                                )
                                              )
                                            }
                                          )
                                      )
                                    }
                                  spids: [811]
                                )
                              ]
                            )
                            (command.ShAssignment
                              pairs: [
                                (assign_pair
                                  lhs: (sh_lhs_expr.Name name:text_row)
                                  op: assign_op.PlusEqual
                                  rhs: {(DQ (${ Id.VSub_Name text_cell))}
                                  spids: [828]
                                )
                              ]
                            )
                            (command.AndOr
                              ops: [Id.Op_DAmp]
                              children: [
                                (command.DParen
                                  child: 
                                    (arith_expr.Binary
                                      op_id: Id.Arith_NEqual
                                      left: <Id.Lit_ArithVarLike col>
                                      right: 
                                        (arith_expr.Binary
                                          op_id: Id.Arith_Minus
                                          left: <Id.Lit_ArithVarLike text_size>
                                          right: {<Id.Lit_Digits 1>}
                                        )
                                    )
                                )
                                (command.ShAssignment
                                  pairs: [
                                    (assign_pair
                                      lhs: (sh_lhs_expr.Name name:text_row)
                                      op: assign_op.PlusEqual
                                      rhs: {(DQ (${ Id.VSub_Name colsep))}
                                      spids: [849]
                                    )
                                  ]
                                )
                              ]
                            )
                          ]
                        )
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:columnized)
                          op: assign_op.PlusEqual
                          rhs: 
                            {
                              (sh_array_literal
                                left: <Id.Op_LParen _>
                                words: [{(DQ ($ Id.VSub_DollarName '$text_row'))}]
                              )
                            }
                          spids: [860]
                        )
                      ]
                    )
                  ]
                )
            )
          ]
        )
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (command.DBracket
                      expr: 
                        (bool_expr.Binary
                          op_id: Id.BoolBinary_GlobDEqual
                          left: {($ Id.VSub_Number '$0')}
                          right: 
                            {
                              (braced_var_sub
                                token: <Id.VSub_Name BASH_SOURCE>
                                bracket_op: (bracket_op.ArrayIndex expr:{<Id.Lit_Digits 0>})
                              )
                            }
                        )
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (command.ShFunction
              name: print_columns
              body: 
                (BraceGroup
                  children: [
                    (C {<unset>} {<columnized>})
                    (C {<typeset>} {<-a>} {<columnized>})
                    (C {<typeset>} {<-a>} {<list>})
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:list)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (sh_array_literal
                                left: <Id.Op_LParen _>
                                words: [{($ Id.VSub_Number '$1')}]
                              )
                            }
                          spids: [926]
                        )
                      ]
                    )
                    (C {<columnize>} {($ Id.VSub_Number '$2')} {($ Id.VSub_Number '$3')})
                    (C {<typeset>} {<-i>} {<i>})
                    (C {<echo>} {(SQ <'==============='>)})
                    (command.ForExpr
                      init: 
                        (arith_expr.BinaryAssign
                          op_id: Id.Arith_Equal
                          left: <Id.Lit_ArithVarLike i>
                          right: {<Id.Lit_Digits 0>}
                        )
                      cond: 
                        (arith_expr.Binary
                          op_id: Id.Arith_Less
                          left: <Id.Lit_ArithVarLike i>
                          right: 
                            {
                              (braced_var_sub
                                token: <Id.VSub_Name columnized>
                                prefix_op: (Id.VSub_Pound)
                                bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                              )
                            }
                        )
                      update: 
                        (arith_expr.UnaryAssign
                          op_id: Id.Node_PostDPlus
                          child: <Id.Lit_ArithVarLike i>
                        )
                      body: 
                        (command.DoGroup
                          children: [
                            (C {<printf>} 
                              {
                                (DQ 
                                  (braced_var_sub
                                    token: <Id.VSub_Name columnized>
                                    bracket_op: 
                                      (bracket_op.ArrayIndex
                                        expr: {($ Id.VSub_DollarName '$i')}
                                      )
                                  ) <Id.Lit_BadBackslash '\\'> <n>
                                )
                              }
                            )
                          ]
                        )
                    )
                  ]
                )
            )
            (C {<print_columns>})
            (C {<print_columns>} {(SQ )})
            (C {<print_columns>} {<oneitem>})
            (C {<print_columns>} {(SQ <'a 2 c'>)} {<10>} {(SQ <', '>)})
            (C {<print_columns>} 
              {
                (SQ <' one two three\n'> <'  4ne 5wo 6hree\n'> <'  7ne 8wo 9hree\n'> <'  10e 11o 12ree'>)
              } {<18>}
            )
            (C {<print_columns>} {(SQ <' 1   two three\n'> <'  for 5   six\n'> <'  7   8'>)} {<12>})
            (C {<print_columns>} {(SQ <' 1   two 3\n'> <'  for 5   six\n'> <'  7   8'>)} {<12>})
          ]
          spids: [873 892]
        )
      ]
    )
  ]
)