bug#20020: 25.0.50; `info-display-manual' should reuse existing window where buffer is displayed

[martin rudalics]

>> Does anybody know?  In short: If there's a window that has the buffer,
>> then that window should be selected, and its frame popped to the top
>> (and given focus).  If not, it should work like `switch-to-buffer'.
>
> I'm not sure, maybe Martin could confirm this, but very likely
> you can use display-buffer-reuse-window here.

The basic ingredient is a suitable 'reusable-frames' ALIST entry which
should specify the frames on which to search for such a window.  Apart
from that, plain 'pop-to-buffer' should work.

martin