bug#48356: 28.0.50; choose-completion discards the suffix after the completion boundary

[Stefan Monnier]

> For example when completing a file path "~/emacs/master/li|/calc", where
> "|" is the cursor, and then the candidate "lisp" is selected in the
> *Completions* buffer, the result is "~/emacs/master/lisp/". The prefix
> "~/emacs/master/" is prepended to the selected candidate, but the suffix
> "/calc" is discarded.

Yup.  That's listed under "bugs" at the beginning of minibuffer.el:

    ;; - choose-completion can't automatically figure out the boundaries
    ;;   corresponding to the displayed completions because we only
    ;;   provide the start info but not the end info in
    ;;   completion-base-position.

> ... and the suffix is preserved.

Of course, the suffix should *not* be preserved when the minibuffer was
"r|e-buf".


        Stefan