doc txt & -h consistency: correct padding around "[]()"

The whitespace padding of alternatives should be of the form "[-f |
--force]" not "[-f|--force]". Likewise we should not have padding
before the first option, so "(--all | <pack-filename>...)" is correct,
not "( --all | <pack-filename>... )".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/diagnose.c

@@ -3,7 +3,7 @@
 #include "diagnose.h"
 
 static const char * const diagnose_usage[] = {
-	N_("git diagnose [(-o|--output-directory) <path>] [(-s|--suffix) <format>]\n"
+	N_("git diagnose [(-o | --output-directory) <path>] [(-s | --suffix) <format>]\n"
 	   "             [--mode=<mode>]"),
 	NULL
 };