bug#20628: 25.0.50; Incorrect line height for some fonts

[Eli Zaretskii]

> Date: Fri, 22 May 2015 16:25:05 -0400
> From: Clément Pit--Claudel
>  <clement.pitclaudel@live.com>
> CC: ohwoeowho@gmail.com, 20628@debbugs.gnu.org
> 
> On 05/22/2015 03:35 PM, Eli Zaretskii wrote:
> >> Date: Fri, 22 May 2015 15:03:24 -0400
> >> From: Clément Pit--Claudel
> >>  <clement.pitclaudel@live.com>
> >> CC: 20628@debbugs.gnu.org
> >>
> >> I believe you have something like the following line in mind:
> >>
> >>   (set-fontset-font fontset 'unicode (font-spec :name "Symbola") nil 
> >> 'append)
> > 
> > That's too radical.  You could be more selective, e.g.:
> > 
> >   (set-fontset-font "fontset-default"
> >                     '(#x1d400 . #x1d7ff)
> >                 "Symbola")
> > 
> > That's because you may wish using other fonts for other Unicode
> > blocks.
> 
> Note that I added the 'append parameter at the end of that line, so if it is 
> executed last (and if I understand correctly!) then it should not override 
> any other preferences.

When you use 'append' you can never know whether that would fix the
problem, because there could be other specs in the fontset that
override your addition.