pretty: avoid adding reset for %C(auto) if output is empty

diff --git a/pretty.c b/pretty.c
index b86c5bb907ee8607d054f8afde6ab15f8c90a183..bad1bfb225a32f51920c1c6fdd1085b8b46bfc58 100644 (file)
--- a/pretty.c
+++ b/pretty.c
@@ -1062,7 +1062,7 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
        case 'C':
                if (starts_with(placeholder + 1, "(auto)")) {
                        c->auto_color = want_color(c->pretty_ctx->color);
-                       if (c->auto_color)
+                       if (c->auto_color && sb->len)
                                strbuf_addstr(sb, GIT_COLOR_RESET);
                        return 7; /* consumed 7 bytes, "C(auto)" */
                } else {