Merge with 3.3.

diff --cc Doc/faq/library.rst
Simple merge

diff --cc Doc/library/functions.rst
Simple merge

diff --cc Doc/library/subprocess.rst
Simple merge

diff --cc Doc/library/sys.rst
Simple merge

diff --cc Doc/library/xml.etree.elementtree.rst
Simple merge

diff --cc Doc/reference/datamodel.rst
Simple merge

diff --cc Doc/reference/import.rst
Simple merge