[NTG-context] Vertical space when surrounding with textbackground

[Johann Birnick]

On Thu, 2020-11-26 at 17:31 +0100, Wolfgang Schuster wrote:
> Johann Birnick schrieb am 26.11.2020 um 17:00:
> > On Thu, 2020-11-26 at 09:38 -0500, Aditya Mahajan wrote:
> > > On Thu, 26 Nov 2020, Johann Birnick wrote:
> > > 
> > > > How to surround such things properly? I just want a background to these
> > > > and
> > > > a
> > > > sidebar. No addition spacing / empty lines.
> > > 
> > > A MWE will help...
> > > 
> > > Aditya
> > 
> > For example, take:
> > 
> > \definetextbackground[code][background=color, backgroundcolor=lightgray,
> > frame=off, location=paragraph]
> > 
> > \starttextbackground[code]
> > \starttyping
> > This is some code
> > a second line
> > \stoptyping
> > \stoptextbackground
> 
> You missed the W (working) in MWE.
> 
> \definetextbackground
>    [Code]
>    [          frame=off,
>          background=color,
>     backgroundcolor=lightgray,
>            location=paragraph]
> 
> \setuptyping
>    [before={\blank\starttextbackground[Code]},
>      after={\stoptextbackground\blank}]
> 
> \starttext
> 
> \starttyping
> This is some code
> a second line
> \stoptyping
> 
> \stoptext
> 
> Wolfgang

Okay so first sorry that the example missed the \starttext ... \stoptext. Won't
happen again.

So unfortunately my MWE was too minimal. Actually this works:

\definetextbackground[code][background=color, backgroundcolor=lightgray,
frame=off, location=paragraph]

\setuptyping[before={\startbackground[code]}, after={\stopbackground}]

\starttext
\starttyping
This is some code
a second line
\stoptyping
\stoptext

However, I use pretty printing. When you add [option=XML] to \starttext it
breaks.

Why?

Thank you,
Johann