old_contents: #!/usr/bin/python
  # -*- coding: UTF-8 -*-
  
  import datetime
  import random
  import pickle
  import re
  import json
  import os
  
  if __name__ == "__main__":
      print "add print"
      print "201602060850"
  
new_contents: #!/usr/bin/python
  # -*- coding: UTF-8 -*-
  
  import datetime
  import random
  import pickle
  import re
  import json
  import os
  
  if __name__ == "__main__":
      print "add print"
      print "abc"
  
subject: test commit 2