bug#14645: Keep highlighting face foreground

[Lars Ingebrigtsen]

Juri Linkov <juri@jurta.org> writes:

> Now that we have a new function `add-face-text-property' it would be
> very useful for features that add faces with a different background
> to highlight matches.  For instance, `occur' uses `add-text-properties'
> to add the `match' face, but currently it removes foreground colors
> from the text copied from the fontified buffer.

[...]

> +                      '(occur-match t) curstring)
> +                     (when match-face
> +                       ;; Add `match-face' to faces copied from the buffer.
> +                       (add-face-text-property
> +                        (match-beginning 0) (match-end 0)
> +                        match-face nil curstring))

Looks like a variation of this has been applied already.

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