standardize usage info string format

This patch puts the usage info strings that were not already in docopt-
like format into docopt-like format, which will be a litle easier for
end users and a lot easier for translators. Changes include:

- Placing angle brackets around fill-in-the-blank parameters
- Putting dashes in multiword parameter names
- Adding spaces to [-f|--foobar] to make [-f | --foobar]
- Replacing <foobar>* with [<foobar>...]

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Reviewed-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/update-ref.c

@@ -6,9 +6,9 @@
 #include "argv-array.h"
 
 static const char * const git_update_ref_usage[] = {
-	N_("git update-ref [options] -d <refname> [<oldval>]"),
-	N_("git update-ref [options]    <refname> <newval> [<oldval>]"),
-	N_("git update-ref [options] --stdin [-z]"),
+	N_("git update-ref [<options>] -d <refname> [<old-val>]"),
+	N_("git update-ref [<options>]    <refname> <new-val> [<old-val>]"),
+	N_("git update-ref [<options>] --stdin [-z]"),
 	NULL
 };