doc txt & -h consistency: balance unbalanced "[" and "]"

Fix a "-h" output syntax issue introduced when "--diagnose" was added
in aac0e8f (builtin/bugreport.c: create '--diagnose' option,
2022-08-12): We need to close the "[" we opened. The
corresponding *.txt change did not have the same issue.

The "help -h" output then had one "]" too many, which is an issue
introduced in b408452 (help: correct the usage string in -h and
documentation, 2021-09-10).

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

builtin/bugreport.c

@@ -61,7 +61,7 @@ static void get_populated_hooks(struct strbuf *hook_info, int nongit)
 
 static const char * const bugreport_usage[] = {
 	N_("git bugreport [(-o|--output-directory) <file>] [(-s|--suffix) <format>]\n"
-	   "              [--diagnose[=<mode>]"),
+	   "              [--diagnose[=<mode>]]"),
 	NULL
 };
 

builtin/help.c

@@ -88,7 +88,7 @@ static struct option builtin_help_options[] = {
 };
 
 static const char * const builtin_help_usage[] = {
-	"git help [-a|--all] [--[no-]verbose]] [--[no-]external-commands] [--[no-]aliases]",
+	"git help [-a|--all] [--[no-]verbose] [--[no-]external-commands] [--[no-]aliases]",
 	N_("git help [[-i|--info] [-m|--man] [-w|--web]] [<command>|<doc>]"),
 	"git help [-g|--guides]",
 	"git help [-c|--config]",