This answer is clearly invalid, given that you read the language's documentation.
I used a custom mod flag to flag it as invalid, since it prints a Unicode
☆ instead of outputting an image with a 5-pointed star (like this one). My flag got declined, since there was apparently no evidence to support it.
The user didn't get warned, but I'm not sure if my flag was wrong, that's why I've asked here. The other reason might have been since the question was closed as unclear (which should have been closed as too broad instead IMO).
Note: actual flag text is hidden.