bin/xbps-query: fix -R/--repository parsing

this makes the behaviour match what xbps-install et al. do, namely
-R <repo> and --repository <repo> now work. Existing behaviours are
preserved.

bin/xbps-query/main.c

@@ -48,7 +48,7 @@ usage(bool fail)
 	    " -p, --property PROP[,...] Show properties for PKGNAME\n"
 	    " -R, --repository          Enable repository mode. This mode explicitly\n"
 	    "                           looks for packages in repositories\n"
-	    "     --repository=<url>    Enable repository mode and add repository\n"
+	    " -R, --repository <url>    Enable repository mode and add repository\n"
 	    "                           to the top of the list. This option can be\n"
 	    "                           specified multiple times\n"
 	    "     --regex               Use Extended Regular Expressions to match\n"
@@ -171,6 +171,9 @@ main(int argc, char **argv)
 			show_prop = true;
 			break;
 		case 'R':
+			if (optarg == NULL && optind < argc && argv[optind][0] != '-') {
+				optarg = argv[optind++];
+			}
 			if (optarg != NULL) {
 				xbps_repo_store(&xh, optarg);
 			}

bin/xbps-query/xbps-query.1

@@ -105,11 +105,11 @@ Multiple properties can be specified by delimiting them with commas.
 For a list of available properties, see the
 .Sx PROPERTIES
 section.
-.It Fl R
+.It Fl R , Fl -repository
 Enable repository mode.
 This mode explicitly looks in repositories, rather
 than looking in the target root directory.
-.It Fl -repository=url
+.It Fl R , Fl -repository Ar url
 Appends the specified repository to the top of the list.
 The
 .Ar url