adds -u in usage() --- /sys/src/cmd/diff/main.c +++ /sys/src/cmd/diff/main.c @@ -176,7 +176,7 @@ void usage(void) { - fprint(2, "usage: %s [-abcefmnrw] file1 ... file2\n", argv0); + fprint(2, "usage: %s [-abcefmnruw] file1 ... file2\n", argv0); exits("usage"); }