`multi_aff` suffers from pcpp's whitespace dropping behavior?

[thisiscam]

Hi,

I noticed that functions like get_space never made into the wrapped MultiAff class.
After some investigation, I believe it's caused by this issue.

I also hypothesize that this is the cause of the following behavior:

assert islpy.MultiAff("{[i] -> [i]}") == islpy.MultiAff("{[i] -> [i]}") # Assertion error !

[inducer]

Thanks for tracking that down! I agree that that's plausible. A thing we could do is modify the headers before we feed them to pcpp, to sidestep the issue pending a fix on their end. I'd be happy to look at a PR to that effect.

[thisiscam]

#74 doesn't appear to fix the equality test assertion error though.
I will to open a separate issue/PR for that.