Function make_diff

ci/run-clang-format.py:102–111

(file: str, original: list[str], reformatted: list[str])

def make_diff(file: str, original: list[str], reformatted: list[str]) -> list[str]:
    return list(
        difflib.unified_diff(
            original,
            reformatted,
            fromfile="{}\t(original)".format(file),
            tofile="{}\t(reformatted)".format(file),
            n=3,
        )
    )


class DiffError(Exception):