old_contents: #!/usr/bin/env python
  """
  Copyright 2015 ARC Centre of Excellence for Climate Systems Science
  
  author: Scott Wales <scott.wales@unimelb.edu.au>
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  """
  
  from ftools.parser.Fortran03Parser   import Fortran03Parser
  from ftools.parser.Fortran03Listener import Fortran03Listener
  
  from antlr4.Token import Token
  
  class Writer(Fortran03Listener):
      """
      Writes the parse tree
      """
      def __init__(self, bufferedTokenStream, outputStream):
          self.stream = outputStream
          self.hidden = bufferedTokenStream
  
      def writeToken(self, token):
          """
          Write a token
          """
          self.stream.write(token.text)
  
      def writeHidden(self, token):
          """
          Write hidden tokens to the left of this one
          """
          index = token.tokenIndex
          hidden = self.hidden.getHiddenTokensToLeft(index)
          if hidden:
              for t in hidden:
                  self.writeToken(t)
  
      def writeFinalise(self):
          """
          Write out any final hidden tokens
          """
          index = len(self.hidden.tokens) - 1
          hidden = self.hidden.getHiddenTokensToLeft(index)
          if hidden:
              for t in hidden:
                  self.writeToken(t)
  
      def visitTerminal(self, node):
          """
          Write out a terminal token
          """
          # node is a TerminalNodeImpl
          token = node.getSymbol()
          self.writeHidden(token)
          self.writeToken(token)
          print token
  
          if token.type == Token.EOF:
              self.writeFinalise(token)
  
      def exitProgram(self, ctx):
          self.writeFinalise()
  
  
  
new_contents: #!/usr/bin/env python
  """
  Copyright 2015 ARC Centre of Excellence for Climate Systems Science
  
  author: Scott Wales <scott.wales@unimelb.edu.au>
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  """
  
  from ftools.parser.Fortran03Parser   import Fortran03Parser
  from ftools.parser.Fortran03Listener import Fortran03Listener
  
  from antlr4.Token import Token
  
  class Writer(Fortran03Listener):
      """
      Writes the parse tree
      """
      def __init__(self, bufferedTokenStream, outputStream):
          self.stream = outputStream
          self.hidden = bufferedTokenStream
  
      def writeToken(self, token):
          """
          Write a token
          """
          self.stream.write(token.text)
  
      def writeHidden(self, token):
          """
          Write hidden tokens to the left of this one
          """
          index = token.tokenIndex
          hidden = self.hidden.getHiddenTokensToLeft(index)
          if hidden:
              for t in hidden:
                  self.writeToken(t)
  
      def writeFinalise(self):
          """
          Write out any final hidden tokens
          """
          index = len(self.hidden.tokens) - 1
          hidden = self.hidden.getHiddenTokensToLeft(index)
          if hidden:
              for t in hidden:
                  self.writeToken(t)
  
      def visitTerminal(self, node):
          """
          Write out a terminal token
          """
          # node is a TerminalNodeImpl
          token = node.getSymbol()
          self.writeHidden(token)
          self.writeToken(token)
  
      def exitProgram(self, ctx):
          self.writeFinalise()
  
  
  
subject: Remove unused code