docs: improve comment

system/Router/AutoRouterImproved.php

@@ -519,13 +519,15 @@ private function checkUriForMethod(string $method): void
  return;
  }
 
- // If `getSomeMethod()` exists, only `controller/some-method` should be
- // accessible. But if a visitor navigates to `controller/somemethod`,
- // `getSomemethod()` will be checked, and method_exists() will return true.
  if (
+ // For example, if `getSomeMethod()` exists in the controller, only
+ // the URI `controller/some-method` should be accessible. But if a
+ // visitor navigates to the URI `controller/somemethod`, `getSomemethod()`
+ // will be checked, and `method_exists()` will return true because
+ // method names in PHP are case-insensitive.
  method_exists($this->controller, $method)
- // We do not permit `controller/somemethod`, so check the exact method
- // name.
+ // But we do not permit `controller/somemethod`, so check the exact
+ // method name.
  && ! in_array($method, get_class_methods($this->controller), true)
  ) {
  throw new PageNotFoundException(