On 4/30/21 12:54 AM, Juri Linkov wrote:
> Then there are only minor details remaining:
> 
> 1. for read-char-by-name, the first candidate of a group
>    is displayed at the end of the same line with the group title
>    (perhaps easy to fix);

I fixed this. There was a missing "\n" after the group titles.

> 2. it would be nice to support vertical/horizontal formats
>    inside every group, not only one-column.

Yes, this should be added. The current patch contains a TODO above the
`completion--insert-strings` function. I intend to rework the
`completion--insert-strings` function, splitting it into three
functions, one for each format. This should make this code easier to
maintain. Then I will also add support for group titles. I will
implement a second patch, which implements these changes.

I attached the current version of the patch (REVISED PATCH VERSION 2).
In comparison to the previous "REVISED PATCH" I made minor
cleanups and changes and fixed the "\n" issue you noticed. There is the
question if the `completions-detailed` variable should be reused to also
guard the grouping (See the NOTE in the commit message of the patch).

Daniel