ENH: use size instead of cythonized count for fallback cases
Added text to the HDFStore.put() method indicating dropna is available and settable via option, as for append()
BUG: df.boxplot fails to use existing axis/subplot (#3578)

axes needs to be a plt.Axes object

use ax get_axes() to set axes

Add tests for use of existing axis

Add test for when by is None

Add fix to the release notes
BUG: Fix Xl(sx|wt)Writer always using `date_format`.

Since `datetime.datetime` derives from `datetime.date` the second
`if`-clause will always trigger, leading to the `num_format_str` being
overwritten by the `date_format`.
Merge pull request #7075 from filmor/patch-1

Fix Xl(sx|wt)Writer always using date_format even if a datetime is supplied.
Merge pull request #7064 from davidljung/master

Added dropna to docstring for HDFStore.put()
Merge pull request #7055 from cpcloud/groupby-count-with-size

ENH: use size instead of cythonized count for fallback cases
DOC: Remove newline in @verbatim code-block.

This makes the tab-completed code show up in the rendered documentation.
Merge pull request #7078 from chebee7i/patch-1

DOC: Remove newline in @verbatim code-block.
BUG: None in read_fwf colspec should work like empty slice

DOC: update read_fwf docs
Merge pull request #7081 from TomAugspurger/fwf-slice

BUG: read_fwf colspec should treat None like slice
BUG: cache coherence issue with chain indexing and setitem (GH7084)
Merge pull request #7087 from jreback/series_cache

BUG: cache coherence issue with chain indexing and setitem (GH7084)
BUG: use size attribute (not method call)
BUG: force float64 dtype in object results for groupby
BUG: DatetimeIndex cannot parse string ndarray with dayfirst
Merge pull request #7038 from sinhrks/dayfirst

BUG: DatetimeIndex cannot parse string ndarray with dayfirst
ENH/CLN: Add factorize to IndexOpsMixin
Merge pull request #7090 from sinhrks/factorize

ENH/CLN: Add factorize to IndexOpsMixin
BUG: unstack fails in PeriodIndex