It's polite to give parsers (human or otherwise) hints that they're about to encounter text which is now intended for a different kind of parser.

I recently forgot to surround my code in ``` and Gemini refused to help with it (I think I tripped a safety guardrail, it thought I was targeting it with an injection attack). Amusingly, the two ways to work around it were to fence off my code with backticks or to just respond to:

> I can't help you with that

With

> Why not?

After which it was then willing to help with the unquoted code. Presumably it then perceived it as some kind of philosophical puzzle rather than an attack.