(CommandList
  children: [
    (AndOr
      children: [
        (FuncDef
          name: _gendiff
          body: 
            (BraceGroup
              children: [
                (Assignment
                  keyword: Assign_Local
                  pairs: [
                    (assign_pair lhs:(LhsName name:cur) op:Equal spids:[13])
                    (assign_pair lhs:(LhsName name:prev) op:Equal spids:[15])
                    (assign_pair lhs:(LhsName name:words) op:Equal spids:[17])
                    (assign_pair lhs:(LhsName name:cword) op:Equal spids:[19])
                  ]
                  spids: [11]
                )
                (AndOr
                  children: [
                    (C {(_init_completion)} {(-o)} {(SQ <'@(diff|patch)'>)})
                    (ControlFlow token:<ControlFlow_Return return>)
                  ]
                  op_id: Op_DPipe
                )
                (AndOr
                  children: [
                    (DBracket
                      expr: (BoolBinary op_id:BoolBinary_eq left:{($ VSub_Name '$cword')} right:{(1)})
                    )
                    (C {(_filedir)} {(-d)})
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                  op_id: Op_DAmp
                )
              ]
              spids: [8]
            )
          spids: [4 7]
        )
        (C {(complete)} {(-F)} {(_gendiff)} {(gendiff)})
      ]
      op_id: Op_DAmp
    )
  ]
)