Merge branch 'main' into dj

src/dj.c

@@ -249,10 +249,10 @@ parse(char *s){
 static int
 usage(char *s){
 
-	fprintf(stderr, "Usage: %s (-Hn) (-a [byte]) (-c [count])\n"
-		"\t(-i [input file]) (-b [input block size]) (-s [input offset])\n"
-		"\t(-o [output file]) (-B [output block size]) (-S [output offset])\n",
-		s);
+	fprintf(stderr, "Usage: %s [-Hn] [-a byte] [-c count]\n"
+		"\t[-i file] [-b block_size] [-s offset]\n"
+		"\t[-o file] [-B block_size] [-S offset]\n",
+		program_name);
 
 	return EX_USAGE;
 }