str(1): fix brackets

src/str.c

@@ -46,13 +46,13 @@ static struct {
 };
 
 static int
-usage(char *argv0){
+usage(char *argv0) {
 	(void)fprintf(stderr, "Usage: %s type string...\n", argv0);
 
 	return EX_USAGE;
 }
 
-int main(int argc, char *argv[]){
+int main(int argc, char *argv[]) {
 	size_t ctype; // selected from ctypes.h; index of ctype
 	int retval; // initially fail but becomes success on the first valid char