builtin/gc.c: add missing newline in message

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/gc.c

diff --git a/builtin/gc.c b/builtin/gc.c
index ff5f73b..0498094 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -225,7 +225,7 @@
 			fprintf(stderr,
 					_("Auto packing the repository for optimum performance. You may also\n"
 					"run \"git gc\" manually. See "
-					"\"git help gc\" for more information."));
+					"\"git help gc\" for more information.\n"));
 	} else
 		append_option(argv_repack,
 			      prune_expire && !strcmp(prune_expire, "now")