old_contents: #! /usr/bin/env python
  ########################################################################
  #
  #  Copyright 2014 Johns Hopkins University
  #
  # 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.
  #
  # Contact: turbulence@pha.jhu.edu
  # Website: http://turbulence.pha.jhu.edu/
  #
  ########################################################################import os
  
  import os
  
  if not os.path.isdir('turblib'):
      os.system('svn checkout https://github.com/idies/Turbulence/trunk/turblib')
  else:
      os.chdir('turblib')
      os.system('svn update')
      os.chdir('..')
  
new_contents: #! /usr/bin/env python
  ########################################################################
  #
  #  Copyright 2014 Johns Hopkins University
  #
  # 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.
  #
  # Contact: turbulence@pha.jhu.edu
  # Website: http://turbulence.pha.jhu.edu/
  #
  ########################################################################import os
  
  import os
  
  if not os.path.isdir('turblib'):
      os.system('git clone https://github.com/idies/turblib')
  else:
      os.chdir('turblib')
      os.system('git pull')
      os.chdir('..')
  
  
subject: update update_turblib.py