Re: BIKESHED: completion faces

[Juri Linkov]

> So, what should we go for:
> - bold (but then we need to change the `completions-first-difference`
>   face to keep it different, e.g. underlined)?

bold in completions-first-difference helps to immediately see the
next character to type to narrow completions further.

> - underlined (tho I don't like underlined text very much)?
> - some foreground color?

For several years I've been using completions-common-part
inherited from the 'shadow' face, and it works pretty well
for this purpose.

> - some background color?
> - something else?