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/symbolic-ref.c

@@ -4,8 +4,8 @@
 #include "parse-options.h"
 
 static const char * const git_symbolic_ref_usage[] = {
-	N_("git symbolic-ref [options] name [ref]"),
-	N_("git symbolic-ref -d [-q] name"),
+	N_("git symbolic-ref [<options>] <name> [<ref>]"),
+	N_("git symbolic-ref -d [-q] <name>"),
 	NULL
 };