Replace printf by puts for fixed strings. This would avoid issues caused

by formats introduced in translated strings.

src/groupmod.c

@@ -100,7 +100,7 @@ static gid_t get_gid (const char *gidstr);
 
 static void usage (void)
 {
-	fprintf (stderr, _("Usage: groupmod [options] GROUP\n"
+	fputs (_("Usage: groupmod [options] GROUP\n"
 			   "\n"
 			   "Options:\n"
 			   "  -g, --gid GID                 force use new GID by GROUP\n"
@@ -108,7 +108,7 @@ static void usage (void)
 			   "  -n, --new-name NEW_GROUP      force use NEW_GROUP name by GROUP\n"
 			   "  -o, --non-unique              allow using duplicate (non-unique) GID by GROUP\n"
 			   "  -p, --password PASSWORD       use encrypted password for the new password\n"
-			   "\n"));
+			   "\n"), stderr);
 	exit (E_USAGE);
 }