Re: [PATCH] Handle case where `beg` and `end` are strings instead of markers

[Juri Linkov]

> Upon further inspection, I see that `minibuffer-completion-help` is setting
> `completion-list-insert-choice-function` to a function that checks if the 
> `beg`
> and `end` arguments are strings, in which case it just replaces the
> minibuffer contents with "beg" + "choice" + "end". Indeed, when doing
> `completing-read` instead of `completing-read-multiple`,
> `completion--replace` doesn't get called at all in this case.

completing-read-multiple already overrides choose-completion-string-functions
with own crm--choose-completion-string.  So it would also make sense to
override completion-list-insert-choice-function as well.