[LyX/master] Support the mathbbm font.

[Kornel Benko]

Am Mon, 27 Jul 2020 16:29:18 +0200
schrieb Kornel Benko <kornel at lyx.org>:

> Am Mon, 27 Jul 2020 12:33:17 +0200
> schrieb Pavel Sanda <sanda at lyx.org>:
> 
> > On Mon, Jul 27, 2020 at 04:56:48AM +0200, Thibaut Cuvelier wrote:  
> > > commit e709a6626e731b460a98ea34d762a776de90b54c
> > > Author: Thibaut Cuvelier <tcuvelier at lyx.org>
> > > Date:   Mon Jul 27 03:14:38 2020 +0200
> > > 
> > >     Support the mathbbm font.
> > >     
> > >     Should just be able to read formulae, not add it from the GUI, as it's mostly
> > > redundant with mathds and mathbb.    
> > 
> > Hi Thibaut,
> > 
> > why is this font addition needed?
> > And how is it related to the changes in src/output_docbook.cpp?
> > 
> > Pavel  
> 
> Math.lyx is not compilable (pdflatex)
> 
> The display of 'Introduction' in Math.lyx is wrong (See attached (new and old))
> 
> The multicolumn is now impossible.

The bisect for this one leads to
3b6fec38357949da2675dd4524282f1c790eff6e is the first bad commit
commit 3b6fec38357949da2675dd4524282f1c790eff6e
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Wed Jul 15 09:11:05 2020 +0200

    Do not terminate size switches in front of insets with InheritFont() false
    
    and inherit the size.
    
    This reduces formatting clutter (#8384) in table and fixes some wrongly
    set sizes (#9923, #9285) in tables.

:040000 040000 0f1e962b245826e63668b2e2b788ffdf261dbfc8
9f926691f89cf1dadc27418c03763f1776458a80 M	src

Attached a minimal example

	Kornel

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