blkid: make help text show [BLOCKDEV]...

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

util-linux/blkid.c

@@ -8,15 +8,13 @@
  */
 
 //usage:#define blkid_trivial_usage
-//usage:       ""
+//usage:       "[BLOCKDEV]..."
 //usage:#define blkid_full_usage "\n\n"
 //usage:       "Print UUIDs of all filesystems"
 
 #include "libbb.h"
 #include "volume_id.h"
 
-//TODO: extend to take BLOCKDEV args, and show TYPE="fstype"
-
 int blkid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int blkid_main(int argc UNUSED_PARAM, char **argv)
 {