DOC: fix file modes

Author: jreback

doc/source/conf.py

@@ -17,6 +17,7 @@
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 # sys.path.append(os.path.abspath('.'))
+
 sys.path.insert(0, os.path.abspath('../sphinxext'))
 
 sys.path.extend([

doc/source/cookbook.rst

@@ -265,7 +265,7 @@ Storing Attributes to a group node
 Miscellaneous
 -------------
 
-The :ref:`Timedeltas <timeseries.timedeltas>` docs
+The :ref:`Timedeltas <timeseries.timedeltas>` docs.
 
 `Operating with timedeltas
 <https://github.com/pydata/pandas/pull/2899>`__