BUG: Series/DataFrame.rank() doesn't handle small floats correctly #6868

adding test for ranking with np.inf

Added release note #6886

Fixing float conversions in test_rank()
Update indexing.py

Adding a space
Merge pull request #6946 from ribonoous/patch-1

Update indexing.py
BLD: add excel deps to 2.6 build
BUG: Fix to read decimal seconds from Excel.

Fix to allow decimal seconds to be read from Excel dates and times
into datetime objects. #5945.
Merge pull request #6934 from jmcnamara/bug_decimal_seconds

BUG: Fix to read decimal seconds from Excel.