Rename the file [google-java-format-diff.py](https://github.com/google/google-java-format/blob/master/scripts/google-java-format-diff.py) to `google_java_format_diff.py` so that it can be imported as a module.
Rename the file google-java-format-diff.py to
google_java_format_diff.pyso that it can be imported as a module.