bug#81537: 32.0.50; Fixing icomplete-in-buffer requiring users to advice-add

>  (defcustom icomplete-in-buffer nil
>    "If non-nil, use Icomplete when completing in buffers other than minibuffer.
>  This affects commands like `completion-in-region', but not commands
> -that use their own completions setup.
> -
> -If you would prefer to see only Icomplete's in-buffer display, but do
> -not want the \"*Completions*\" buffer to pop up in those cases, add
> -this advice to your init file:

Now we need to replace this with a suggestion how to do the opposite
for users who want the *Completions* buffer to pop up after TAB.