bug#54196: 29.0.50; flat-button face box style does not work as expected

[Lars Ingebrigtsen]

David Ponce <da_vid@orange.fr> writes:

> I noticed that the :box :style flat-button is not working as expected:
> the line around the text seems to be there, but not visible.
>
> Just evaluate the below code in the scratch buffer will show the
> problem:
>
> (insert
>  (propertize "This buffer is for text"
>            'font-lock-face
>            '( :box ( :line-width (4 . 4)
>                      :color "dark grey"
>                      :style pressed-button)))
>  "\n"
>  (propertize "This buffer is for text"
>            'font-lock-face
>            '( :box ( :line-width (4 . 4)
>                      :color "dark grey"
>                      :style released-button)))
>  "\n"
>  (propertize "This buffer is for text"
>            'font-lock-face
>            '( :box ( :line-width (4 . 4)
>                      :color "dark grey"
>                      :style flat-button)))
>  "\n"
>  )

I'm not sure what I'm supposed to be looking for here.  Can you include
some screenshots and point to what you think is the problem?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no