log --graph: fix break in graph lines

Output from "git log --graph --stat -p" broke the ancestry graph lines
with a single empty line between the diffstat and the patch.

Signed-off-by: Lucian Poston <lucian.poston@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff.c b/diff.c
index d922b77aef2da84824a8e14fc21961e36e6d2e36..7d5b7ecf14b1e8f256e78eca687474155bc006b7 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -4266,6 +4266,12 @@ void diff_flush(struct diff_options *options)
 
        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 */