bug#47026: 28.0.50; Allow Gnus summary faces to extend to end of line

[Lars Ingebrigtsen]

Kévin Le Gouguec <kevin.legouguec@gmail.com> writes:

>> That is, I think adding :extend t to most Gnus summary faces just brings
>> us back to how it was designed to be displayed.
>
> Mmm, unless I'm missing something, before my patch, the face was not
> applied to the final newline, so even with :extend t the rest of the
> line was not highlighted.
>
> To double-check, I just fired up 26.3, removed %( and %) from
> gnus-summary-line-format, added a background to gnus-summary-selected,
> and opened a summary buffer: sure enough, the background stopped at the
> last character, without extending to the window edge.

I didn't mean `gnus-summary-selected' here, but other Gnus summary
faces, like `gnus-summary-normal-ticked'.

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