bug#19395: 25.0.50; Setting left fringe to 0 messes up window-width

[Eli Zaretskii]

> Date: Sat, 20 Dec 2014 19:58:05 +0100
> From: martin rudalics <rudalics@gmx.at>
> CC: malsburg@posteo.de, 19395@debbugs.gnu.org
> 
>  >> IIUC this contradicts an earlier observation by Titus that
>  >>
>  >>     if the buffer in the specified window is displayed in two frames,
>  >>     the returned character width was always the one used in the current
>  >>     frame which is not necessarily the character width in the specified
>  >>     window (the window may be in the other frame).  This is a problem
>  >>     because character width can be different, if the two frames use
>  >>     different default fonts.
>  >
>  > I don't see any contradictions.  I said nothing about windows, only
>  > about frames and buffers.
> 
> His last sentence says that the outcome is dependent on the frame.  So
> it does not "replace" the original frame-specific face but "merge" the
> frame and buffer specific faces.

No.  When a buffer is displayed that has a face in its
face-remapping-alist, every face in that alist is replaced by its
remapped face.