Diable parsing and warnings for signature
If the user has a signature that can be interpreted by the plugin as a markdown code, the plugin should not interfere with it. Presumably if the user would want that part to be parsed, they would include a preformatted version of the signature. The main issue is that currently it becomes an annoyance to get the warnings when there is no real markdown to be processed, while the user might still want the warning for when it is actually formatted for markdown.
I've encountered this on a friend's setup, and I can't remember the precise formatting to give a real world example, but the following signature would be sufficient to test this behaviour:
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Impractical example to force **markdown**.