BUG: Bug in multi-index slicing with incomplete indexers (GH7399)
BUG: Bug in multi-index slicing with a step in a sliced level (GH7400)
TST7337: Disallow use of dateutil tzfile objects whose filename contains '.tar.gz'.
TST7337: Fix test failures on windows.

Avoid constructing dateutil timezones explicitly because of filename issue.
Use dateutil.tz.tzutc() to construct UTC timezone instead of
dateutil.tz.gettz('UTC')
Update docs to reflect this.
Tidy up examples in the timezones section of the docs.
Add test for conversion between dateutil.tz.tzutc() and dateutil.tz.gettz('UTC')
BUG/OUTPUT: fix repring of MI nat

Fix neg indexers in datetimeindex
make nanops._maybe_null_out work with complex numbers ( issue #7353 )
support axis=None for nanmedian ( issue #7352 )
make nanops work when ndim==1 and axis==0 ( issue #7354 )
Make nanops._has_infs work for additional dtypes and multidimensional arrays ( issue #7357 )
add tests for nanops
minor nanops pep8 fixes
testfix 0
test
support more datetime64 and timedelta dtype variants
also disallow timedeltas for objects that disallow datetime64