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

>> Shouldn't the UI of icomplete-in-buffer be the same as the UI
>> of icomplete in the minibuffer?  That is, only when the user
>> types TAB, it should display the *Completions* buffer,
>> either in the minibuffer or in the regular buffer.
>> But otherwise on typing characters it should display inline
>> candidates immediately, without requiring to type TAB,
>> i.e. something like 'completion-preview-mode' already does.
>
> Do you mean after the *second* tab?  I think the first should definitely
> only display the inline candidates.

I meant an option to display in-buffer icomplete completions without
typing TAB, i.e. like in the minibuffer.  But this would be a new feature.