shortlog: extract `--group` fragment for translation

The subsequent commit will add another unhandled case in
`read_from_stdin()` which will want to use the same message as with
`--group=trailer`.

Extract the "--group=trailer" part from this message so the same
translation key can be used for both cases.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/shortlog.c b/builtin/shortlog.c
index 18f0800c826274cd615cc5e37cda2531a6e370ee..d0645769d7ac512a3b07fb2300de945657cb9d92 100644 (file)
--- a/builtin/shortlog.c
+++ b/builtin/shortlog.c
@@ -132,7 +132,7 @@ static void read_from_stdin(struct shortlog *log)
                match = committer_match;
                break;
        case SHORTLOG_GROUP_TRAILER:
-               die(_("using --group=trailer with stdin is not supported"));
+               die(_("using %s with stdin is not supported"), "--group=trailer");
        default:
                BUG("unhandled shortlog group");
        }