I mean, why can I write in thisway, (just bolding:
**wo**rd, or just italicizing:
*wo*rd), but I can't ***comb***ine bold and italic?
It works non-intra-word, but doesn't work ***intra-***word.
Is it a bug?
You can have combination, just not using asterisks.
See here for an older post where markdown was significantly changed (re-written apparently) https://meta.stackexchange.com/a/229236/230506
Perhaps comment to Balpha about this issue you found.
This is because
* doesn't work if it is next to a punctuation mark or a number, and
** counts as one:
Use HTML or
_ in the meantime:
If a single or double asterisk is supposed to be interpreted as intra-word emphasis, it cannot have punctuation on one side; it actually must be inside a word. An example of an edge case this solves is
It's a web*-based solution.
*see Wikipedia for a definition of "web"
where the asterisks after "web" could cause unintended italicizing if there was a second asterisk in the same paragraph somewhere.