examples: zmqproxy: Apply clang-format
This commit is preparation of the following commit.  Just applied
clang-format.
No functionality has been changed.
@@ -63,7 +63,8 @@ int main(int argc, char ** argv) {
debug_level = atoi(optarg);
break;
default:
- printf("Usage:\n"
+ printf(
+ "Usage:\n"
" -d <debug-level> debug level, 0 - 6\n");
exit(1);
break;
