histedit: conditionalize the imports of 'fcntl' and 'termios'
The recent import of chistedit in
c36175456350 made Windows sad. I'm not sure
if there's other stuff that needs to be done here (e.g. change the default
interface), but this makes the tests run again.
It would have been nicer if the error message indicated these modules were the
problem, but instead it said "*** failed to import extension histedit: No module
named histedit". I'm not sure if there's anything we can do about that.
This directory is meant to cache artifacts useful for tests (such as bundle).
Those artifacts need to be cached because they are slow to regenerate on each
test but too large to be tracked within the repository. They are not expected
to change between each run and can be cached.
The `./scripts/` contains code to generate the artifact while the `cache`
directory contains resulting artifact.