[dev-context] Some math improvements

[Taco Hoekwater]

Hans Hagen wrote:
> Aditya Mahajan wrote:
>> Hi Hans and Taco,
>>
>> I am attaching the math enhancements that I have been promising for 
>> about for some days^H^H^H^Hweeks now. Here are the changes.
>>
>> 1. Improved \llap, \rlap, \clap that work in both math and text mode 
>> (Taco's code)
>>
>> 2. A \cramped macro to go into cramped mode (based on Knuth's code)

> made even more cramped:

FYI: I saw, but did not test this macro.

> i wonder is this genfrac is ok ... dangling \zeropoint etc

I think it is OK. It is a bit over-engineered, but that is not a
problem with the functioning.

Cheers, Taco