diff: fix regression with --stat and unmerged file
A regression was introduced in
12fc4ad89e (diff.c: use utf8_strwidth() to count display width, 2022-09-14)
that causes missing newlines after "Unmerged" entries in `git diff
--cached --stat` output.
This problem affects v2.39.0-rc0 through v2.39.0.
Add the missing newline along with a new test to cover this
behavior.
Signed-off-by: Peter Grayson <pete@jpgrayson.net>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/diff.c b/diff.c
index 2751cae..7e88d7e 100644
--- a/diff.c
+++ b/diff.c
@@ -2784,7 +2784,7 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
else if (file->is_unmerged) {
strbuf_addf(&out, " %s%s%*s | %*s",
prefix, name, padding, "",
- number_width, "Unmerged");
+ number_width, "Unmerged\n");
emit_diff_symbol(options, DIFF_SYMBOL_STATS_LINE,
out.buf, out.len, 0);
strbuf_reset(&out);
