Python: Add example of re.compile missing points-to

[RasmusWL]

@tausbn do you like the idea of having a regressions folder? or should I move them somewhere else?

[tausbn]

Hm. The name "regressions" strikes me as slightly odd in this case:

• Do we know that this ever worked? If not, it's not really a regression.
• Would we move tests out of the directory once they start yielding the correct results?

I think the idea of having a specific place to put points-to failures is sound, though.

Also, I wonder if this might be fixed by #2915 (probably not, as re isn't a built-in per se). This does make me wonder if we're missing something similar in the interface between C and Python modules.

[RasmusWL]

Also, I wonder if this might be fixed by #2915 (probably not, as re isn't a built-in per se). This does make me wonder if we're missing something similar in the interface between C and Python modules.

I tried this out, and the change in #2915 did not solve the problem 😐

[RasmusWL]

I moved things around as we discussed (and did a nasty force-push, since that still felt like the right thing to do).

I also added an other example I had lying around (oh man, messing up the PR name soo much ☹️ ) -- I tried using #2915 on this as well, but no luck