replace return to print in gendiff

Author: ttehasi

gendiff/scripts/gendiff.py

@@ -15,7 +15,7 @@ def main():
     diff = generate_diff(parser.parse_args().first_file,
                          parser.parse_args().second_file,
                          parser.parse_args().format)
-    return diff
+    print(diff)
 
 
 if __name__ == "__main__":