Add hyphens in usage messages.

binutils/ar.c

@@ -211,7 +211,7 @@ void
 usage ()
 {
   fprintf(stderr, "ar %s\n\
-Usage: %s [-]{dmpqrtx}[abcilosuv] [membername] archive-file file...\n\
+Usage: %s [-]{dmpqrtx}[abcilosuv] [member-name] archive-file file...\n\
        %s -M [<mri-script]\n",
 	  program_version, program_name, program_name);
   exit(1);

binutils/copy.c

@@ -109,7 +109,7 @@ Usage: %s [-vVSgxX] [-I format] [-O format] [-F format]\n\
        [--format=format] [--target=format] [--input-format=format]\n\
        [--output-format=format] [--strip-all] [--strip-debug]\n\
        [--discard-all] [--discard-locals] [--verbose] [--version]\n\
-       infile [outfile]\n",
+       in-file [out-file]\n",
 	    program_version, program_name);
     exit(1);
 }