replace_in char for first arg?

[PandorasFox]

beat my head against the wall for a bit since I wasn't reading the docs closely enough / made some assumptions about the interface - I'm not overly familiar with rust/rhai strings, so backticks for single-char strings wasn't really clear.

(alternatively - a segment at the top of this page that calls out "all these methods expect strings, use backticks for single-char strings" would I think go a long way for making that user error more obvious)

In general though, I think the more expected interface & use-case is to be able to just call replace_in('"', "foo") and have that work.