bug#47566: 28.0.50; diff-hl should use `repeat-mode' ... and not `smartrep'

[Juri Linkov]

>> I can't find the face named 'deemphasized'.
>
> Sorry.
>
> Apparently, it's a face that only the tango-plus theme defines (unwisely).
>
> It simply looks like less contrasting text. Try 'shadow' instead, it's
> about the same.

I'm not sure about deemphasizing by default.  But now it's easy to
customize this, and add any emphazing.