Made script working with python 3.5

tools/conll2text.py

@@ -8,7 +8,7 @@ def printUsageAndExit() :
   exit(1)
 
 def choseDelimiter() :
-  return random.choices(["\n", " "], k=1, weights=[10, 50])[0]
+  return random.sample(["\n", " ", " ", " ", " ", " "], k=1)[0]
 
 if __name__ == "__main__" :