message: update example tests
diff: @@ -13,7 +13,7 @@ go(function () use (&$flag, $max_msec){
  echo "coro 1 start to loop for $max_msec msec\n";
  $i = 0;
  while($flag) {
  - echo "$i\n";
  +// echo "$i\n";
  $i ++;
  }
  echo "coro 1 can exit\n";
  @@ -27,4 +27,3 @@ go(function () use (&$flag){
  $flag = false;
  });
  echo "end\n";
  -swoole_event_wait();
  \ No newline at end of file
  