(command.CommandList
  children: [
    (C {<set>} {<-e>})
    (C {<export>} {<Id.Lit_VarLike 'LC_ALL='> <C>})
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {($ Id.VSub_Pound '$#')} {<-lt>} {<3>} 
                      {<Id.Lit_RBracket ']'>}
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (command.Simple
              words: [
                {<echo>}
                {
                  (DQ <'usage: '> ($ Id.VSub_Number '$0') <' OLD-FILE NEW-FILE FILES-TO-BE-PATCHED...'>)
                }
              ]
              redirects: [(redir op:<Id.Redir_GreatAnd '1>&'> loc:(redir_loc.Fd fd:1) arg:{<2>})]
              do_fork: T
            )
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<2>})
          ]
          spids: [65 78]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:old_file)
          op: assign_op.Equal
          rhs: {(DQ ($ Id.VSub_Number '$1'))}
          spids: [100]
        )
      ]
    )
    (C {<shift>})
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:new_file)
          op: assign_op.Equal
          rhs: {(DQ ($ Id.VSub_Number '$1'))}
          spids: [107]
        )
      ]
    )
    (C {<shift>})
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:tmp_old_sorted)
          op: assign_op.Equal
          rhs: {(DQ (command_sub left_token:<Id.Left_DollarParen '$('> child:(C {<mktemp>})))}
          spids: [115]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:tmp_new_sorted)
          op: assign_op.Equal
          rhs: {(DQ (command_sub left_token:<Id.Left_DollarParen '$('> child:(C {<mktemp>})))}
          spids: [122]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:tmp_new_symbols)
          op: assign_op.Equal
          rhs: {(DQ (command_sub left_token:<Id.Left_DollarParen '$('> child:(C {<mktemp>})))}
          spids: [129]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:tmp_patched)
          op: assign_op.Equal
          rhs: {(DQ (command_sub left_token:<Id.Left_DollarParen '$('> child:(C {<mktemp>})))}
          spids: [136]
        )
      ]
    )
    (command.ShFunction
      name: cleanup
      body: 
        (BraceGroup
          children: [
            (C {<rm>} {<-f>} {<-->} {(DQ ($ Id.VSub_DollarName '$tmp_old_sorted'))} 
              {(DQ ($ Id.VSub_DollarName '$tmp_new_sorted'))} {(DQ ($ Id.VSub_DollarName '$tmp_new_symbols'))} {(DQ ($ Id.VSub_DollarName '$tmp_patched'))}
            )
          ]
        )
    )
    (C {<trap>} {<cleanup>} {<0>})
    (C {<sort>} {<-u>} {<-o>} {(DQ ($ Id.VSub_DollarName '$tmp_old_sorted'))} {<-->} 
      {(DQ ($ Id.VSub_DollarName '$old_file'))}
    )
    (C {<sort>} {<-u>} {<-o>} {(DQ ($ Id.VSub_DollarName '$tmp_new_sorted'))} {<-->} 
      {(DQ ($ Id.VSub_DollarName '$new_file'))}
    )
    (command.Simple
      words: [
        {<comm>}
        {<-1>}
        {<-3>}
        {(DQ ($ Id.VSub_DollarName '$tmp_old_sorted'))}
        {(DQ ($ Id.VSub_DollarName '$tmp_new_sorted'))}
      ]
      redirects: [
        (redir
          op: <Id.Redir_Great '>'>
          loc: (redir_loc.Fd fd:1)
          arg: {(DQ ($ Id.VSub_DollarName '$tmp_new_symbols'))}
        )
      ]
      do_fork: T
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:new_symbol_count)
          op: assign_op.Equal
          rhs: 
            {
              (DQ 
                (command_sub
                  left_token: <Id.Left_DollarParen '$('>
                  child: 
                    (command.Simple
                      words: [{<wc>} {<-l>}]
                      redirects: [
                        (redir
                          op: <Id.Redir_Less '<'>
                          loc: (redir_loc.Fd fd:0)
                          arg: {(DQ ($ Id.VSub_DollarName '$tmp_new_symbols'))}
                        )
                      ]
                      do_fork: T
                    )
                )
              )
            }
          spids: [246]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {(DQ ($ Id.VSub_DollarName '$new_symbol_count'))} {<-eq>} 
                      {<0>} {<Id.Lit_RBracket ']'>}
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (command.Simple
              words: [{<echo>} {(DQ <'info: no symbols added'>)}]
              redirects: [(redir op:<Id.Redir_GreatAnd '1>&'> loc:(redir_loc.Fd fd:1) arg:{<2>})]
              do_fork: T
            )
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<0>})
          ]
          spids: [261 276]
        )
      ]
    )
    (command.Simple
      words: [{<echo>} {(DQ <'info: '> ($ Id.VSub_DollarName '$new_symbol_count') <' symbol(s) added'>)}]
      redirects: [(redir op:<Id.Redir_GreatAnd '1>&'> loc:(redir_loc.Fd fd:1) arg:{<2>})]
      do_fork: T
    )
    (command.ForEach
      iter_name: to_be_patched
      iter_words: [{(DQ ($ Id.VSub_At '$@'))}]
      do_arg_iter: F
      body: 
        (command.DoGroup
          children: [
            (C {<sort>} {<-u>} {<-o>} {(DQ ($ Id.VSub_DollarName '$tmp_patched'))} {<-->} 
              {(DQ ($ Id.VSub_DollarName '$to_be_patched'))} {(DQ ($ Id.VSub_DollarName '$tmp_new_symbols'))}
            )
            (command.If
              arms: [
                (if_arm
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.Pipeline
                              children: [
                                (C {<cmp>} {<-s>} {<-->} {(DQ ($ Id.VSub_DollarName '$to_be_patched'))} 
                                  {(DQ ($ Id.VSub_DollarName '$tmp_patched'))}
                                )
                              ]
                              negated: T
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  action: [
                    (command.Simple
                      words: [
                        {<echo>}
                        {(DQ <'info: updating '> ($ Id.VSub_DollarName '$to_be_patched'))}
                      ]
                      redirects: [
                        (redir
                          op: <Id.Redir_GreatAnd '1>&'>
                          loc: (redir_loc.Fd fd:1)
                          arg: {<2>}
                        )
                      ]
                      do_fork: T
                    )
                    (C {<cp>} {<-->} {(DQ ($ Id.VSub_DollarName '$tmp_patched'))} 
                      {(DQ ($ Id.VSub_DollarName '$to_be_patched'))}
                    )
                  ]
                  spids: [344 363]
                )
              ]
            )
          ]
        )
    )
  ]
)