bug#37193: 27.0.50; TAB in article mode gets trapped in the header section

[Katsumi Yamaoka]

On Thu, 26 Sep 2019 01:08:52 +0100, Jose A. Ortega Ruiz wrote:
> No, i actually like to see the URL/title, but what i'm seeing is (only
> for the first link) something that doesn't look like a URL at all, but a
> debug trace... since it contains bytecode, maybe gnus filtered it out,
> here it is again:

>    #[771 <byte-code-removed> [w3m-track-mouse deactivate-mark nil message 
> w3m-url-readable-string get-text-property w3m-balloon-help window-buffer] 9
>     (fn WINDOW OBJECT POS)]

Oh, I see!  I believe it's due to a button.el bug.
Please see the bug report.