should be rendered as an escaped backslash but it actually ends up displayed as an escaped backtick.
But it is a pain and not obvious for the tex.stackexchange.com
Since the same sequence is rendered differently in the question/answer vs comment.
with transcripts on tests in question vs comments.
How come it is bydesign that questions and comments are treated differently with the same syntax?
workaround using double backticks — (already mentioned by @ThisSuitIsBlackNot)
and you will get