[NTG-context] Blank lines inside verbatim environment

```Hello ConTEXist.

```
I know that this probably is no reason, but can be in an environment \starttyping ... \stoptyping turn on, which will each blank line in the statement reflect? I want put in the presentation in this environment, a direct numbers of blank lines. The larger number of empty lines is replaced by a single blank line (for obvious reasons). I tried to experiment with the settings \setuptyping, but without success.
```
Thanx Jaroslav Hajtmar

Here is my minimal example :

```
\definetyping[mytyping][color=blue, style=type, option=, blank=line, space=fixed]%
```
\starttext

\startmytyping
1. line
2. line

5. line

7. line

12. line
\stopmytyping

\stoptext
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