more fixes

src/sleep.c

@@ -10,9 +10,7 @@ int main(int argc, char **argv){
 	int s;
 	if(argc != 2){
 usage:		write(2, "Usage: ", 7);
-		if(argv[0] == NULL)
-			argv[0] = program_name;
-		fdprint(2, argv[0]);
+		fdprint(2, argv[0] == NULL ? program_name : argv[0]);
 		write(2, " [seconds]\n", 11);
 		return EX_USAGE;
 	}

src/str.c

@@ -37,11 +37,6 @@ error:		write(2, "Usage: ", 7);
 		return EX_USAGE;
 	}
 
-	/* We could skip checking the first two characters and replace it with
-	 * a single if(argv[1][0] == 'i' && argv[1][1] == 's') or something
-	 * but it's simpler to just waste the cycles. Plus this doesn't assume
-	 * every ctype starts with "is". */
-
 	for(ctype = 0; ctype < ARRAYLEN(ctypes); ++ctype)
 		if(strcmp(argv[1], ctypes[ctype].name) == 0)
 			goto pass;