avoid trailing whitespace in zero-change diffstat lines

In some cases, we produce a diffstat line even though no
lines have changed (e.g., because of an exact rename). In
this case, there is no +/- "graph" after the number of
changed lines. However, we output the space separator
unconditionally, meaning that these lines contained a
trailing space character.

This isn't a huge problem, but in cleaning up the output we
are able to eliminate some trailing whitespace from a test
vector.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/diff.c b/diff.c
index 62fdc54..f77f9e9 100644
--- a/diff.c
+++ b/diff.c
@@ -922,7 +922,8 @@ static void show_stats(struct diffstat_t* data, struct diff_options *options)
 			total = add + del;
 		}
 		show_name(options->file, prefix, name, len, reset, set);
-		fprintf(options->file, "%5d ", added + deleted);
+		fprintf(options->file, "%5d%s", added + deleted,
+				added + deleted ? " " : "");
 		show_graph(options->file, '+', add, add_c, reset);
 		show_graph(options->file, '-', del, del_c, reset);
 		fprintf(options->file, "\n");