if (output_format & DIFF_FORMAT_PATCH) {
if (separator) {
+ if (options->output_prefix) {
+ struct strbuf *msg = NULL;
+ msg = options->output_prefix(options,
+ options->output_prefix_data);
+ fwrite(msg->buf, msg->len, 1, stdout);
+ }
putc(options->line_termination, options->file);
if (options->stat_sep) {
/* attach patch instead of inline */