The answer here https://unix.stackexchange.com/a/472384/170373 contains this code block:
grep -vE '0.*1|1.*|2.*|3.*|4.*|5.*|6.*|7.*|8.*|9.*8'
In that particular answer, the parts between asterisks are presented in italics, like so:
The question has tags text-processing, awk, sed, grep, perl. I don't think any of those language would warrant asterisks within a single-quoted string to be presented in italics.
In chat, it was noticed that all three code blocks in the answer get different CSS tags: "markdown", "dart", and "perl".
An annoying thing about this issue is that if the answer is opened for editing, the italics don't appear. They only seem to appear in the edit view, if you happen to modify the code block itself and wait a moment for the syntax highlighter to work.