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                (DBracket
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                    (BoolBinary
                      op_id: BoolBinary_GlobDEqual
                      left: {($ VSub_Number '$0')}
                      right: 
                        {
                          (BracedVarSub
                            token: <VSub_Name BASH_SOURCE>
                            bracket_op: (ArrayIndex expr:(ArithWord w:{(Lit_Digits 0)}))
                            spids: [882 887]
                          )
                        }
                    )
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [
            (FuncDef
              name: print_columns
              body: 
                (BraceGroup
                  children: [
                    (C {(unset)} {(columnized)})
                    (Assignment
                      keyword: Assign_Typeset
                      flags: [-a]
                      pairs: [(assign_pair lhs:(LhsName name:columnized) op:Equal spids:[917])]
                      spids: [913]
                    )
                    (Assignment
                      keyword: Assign_Typeset
                      flags: [-a]
                      pairs: [(assign_pair lhs:(LhsName name:list) op:Equal spids:[924])]
                      spids: [920]
                    )
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:list)
                          op: Equal
                          rhs: {(ArrayLiteralPart words:[{($ VSub_Number '$1')}])}
                          spids: [927]
                        )
                      ]
                      spids: [927]
                    )
                    (C {(columnize)} {($ VSub_Number '$2')} {($ VSub_Number '$3')})
                    (Assignment
                      keyword: Assign_Typeset
                      flags: [-i]
                      pairs: [(assign_pair lhs:(LhsName name:i) op:Equal spids:[944])]
                      spids: [940]
                    )
                    (C {(echo)} {(SQ <'==============='>)})
                    (ForExpr
                      init: 
                        (BinaryAssign
                          op_id: Arith_Equal
                          left: (LhsName name:i)
                          right: (ArithWord w:{(Lit_Digits 0)})
                        )
                      cond: 
                        (ArithBinary
                          op_id: Arith_Less
                          left: (ArithVarRef name:i)
                          right: 
                            (ArithWord
                              w: 
                                {
                                  (BracedVarSub
                                    token: <VSub_Name columnized>
                                    prefix_op: VSub_Pound
                                    bracket_op: (WholeArray op_id:Lit_At)
                                    spids: [964 970]
                                  )
                                }
                            )
                        )
                      update: (UnaryAssign op_id:Node_PostDPlus child:(LhsName name:i))
                      body: 
                        (DoGroup
                          children: [
                            (C {(printf)} 
                              {
                                (DQ 
                                  (BracedVarSub
                                    token: <VSub_Name columnized>
                                    bracket_op: (ArrayIndex expr:(ArithWord w:{($ VSub_Name '$i')}))
                                    spids: [987 992]
                                  ) (Lit_Other '\\') (n)
                                )
                              }
                            )
                          ]
                          spids: [980 998]
                        )
                    )
                  ]
                  spids: [905]
                )
              spids: [901 904]
            )
            (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: [16777215 893]
        )
      ]
      spids: [16777215 1070]
    )
  ]
)