FIX: Added small corrections to the test for interpolate limit_area

[cchwala]

• closes # nothing to close here
• tests added / passed
• passes black pandas
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• whatsnew entry # not required for this minor fix

Some tm.assert_series_equal() have been forgotten in

pandas/pandas/tests/series/test_missing.py

Line 1338 in 2baf788

def test_interp_limit_area(self):

There was also a typo in

pandas/pandas/tests/series/test_missing.py

Line 1374 in 2baf788

method="linear", limit_area="outside", direction="backward"

where direction has to be limit_direction.

These things have been fixed in this small PR.

[WillAyd]

lgtm

[WillAyd]

Thanks @cchwala