          # in the solutions file
          pass
  
  if __name__ == '__main__':
      main() 
</s> remove     main() </s> add  </s> remove   main() </s> add  </s> remove     test = UnitTest()
 </s> add     test = TestReverseWords() </s> remove    "metadata": {
    "collapsed": false
   },
 </s> add    "metadata": {},
          # in the solutions file
          pass
  
  if __name__ == '__main__':

keep keep keep keep replace
 #273: Remove nose dependency for staging/ (#283) 
staging/sorting_searching/group_ordered/test_group_ordered.py