[dev-context] Register page number collapse patch

[Hans Hagen]

Mike Bird wrote:
> Greetings,
>
> Attached please find a small patch against the Nov 5th beta
> which fixes a few bugs in register page number compression.
>
>   
ok, i'll have a look

btw, next time, just send me the changed files, which i will then 
compare in a visual diff ; i never managed to get patch working under 
windows

is there also a tex test file?

Hans