TST: windows fixes relatd to Index not-subclass-ndarray
Removed unpaired left-paren.  Rephrased references.
Merge pull request #7959 from mcjcode/docfix

DOC: Removed unpaired right-paren.  Rephrased references.
DOC: cookbook.rst update
API: DatetimeIndex.__init__ accepts nat by str
BUG: each date parsing funcs results differently