* - Only exists on `master`.
     * - Exists on `master` and `releaseX`.
     * If any line is only present on `releaseX` version, then it's a bad file.
     * Also, we ignore empty lines.
     */
    static boolean isBadFileInMergeCommit(String filePath, String mergeCommit, String masterCommit, String releaseCommit) {
        try {