manual: Fix example finding commits referencing given content.

diff --git a/log-tree.c b/log-tree.c
index 3e5e6acfafb5345b8ed4f67599270e841b194ade..23191543d5324f20622048103a821ded4d13b77a 100644 (file)
--- a/log-tree.c
+++ b/log-tree.c
@@ -280,7 +280,8 @@ void show_log(struct rev_info *opt, const char *sep)
        if (opt->show_log_size)
                printf("log size %i\n", (int)msgbuf.len);
 
-       printf("%s%s%s", msgbuf.buf, extra, sep);
+       if (msgbuf.len)
+               printf("%s%s%s", msgbuf.buf, extra, sep);
        strbuf_release(&msgbuf);
 }