fix: Ensure kwargs passed via expand_path

[ReubenFrankel]

Pass through kwargs to expand_path calls where possible to ensure they are propagated to ls implementation by default.

[martindurant]

I agree, but is there any particular situation in which this was a problem for you, perhaps something that could be made into a test?

[ReubenFrankel]

I think I was trying to use download/get and wanted to pass some kwargs through to my ls implementation, which required this change. Happy to write some tests -- would those fit best in fsspec/tests/test_spec.py?

[martindurant]

Happy to write some tests -- would those fit best in fss spec/tests/test_spec.py

Yes, that would be fine. You will see that many of the general-purpose tests use one of the simpler filesystem implementations, though in this case you would need one that actually makes use of some kwarg.

[ReubenFrankel]

@martindurant Let me know if this looks OK

[martindurant]

I am happy to merge, it's up to you whether to keep the test or not.