Issue #16922: fixed findtext() to return empty Unicode string instead of empty bytes object when there's no text.

Patch by Serhiy Storchaka.

could be the cause of a random failure).

special characters in the file path.

returns ESRCH for a zombie process, which is not POSIX-compliant.

Now pindent.py works with a "with" statement.  pindent.py no longer produces
improper indentation.  pindent.py now works with continued lines broken after
"class" or "def" keywords and with continuations at the start of line.  Added
regression tests for pindent.py.  Modernized pindent.py.

#13899: \A, \Z, and \B now correctly match the A, Z, and B literals when used inside character classes (e.g. [A]).  Patch by Matthew Barnett.

The fix for issue 9750 introduced a regression by sorting the row objects
returned by fetchall.  But if a row_factory such as sqlite3.Row is used, the
rows may not be sortable (in Python3), which leads to an exception.  The
sorting is still a nice idea, so the patch moves the sort into the sql.

Fix and test by Peter Otten.

Amaury Forgeot d'Arc. Added tests for partial decoding of non-BMP
characters.

Issue #16884: updated logging documentation to include lastResort and use 'note' directives where appropriate.

TESTFN_NONASCII of test.support from Python 3.4. Backport tests on non-ASCII
paths.

ASCII/surrogateescape codec is now used, instead of the locale encoding, to
decode the command line arguments. This change fixes inconsistencies with
os.fsencode() and os.fsdecode() because these operating systems announces an
ASCII locale encoding, whereas the ISO-8859-1 encoding is used in practice.

Patch by Martin Packman.