Log Message:
Python 3.4.3 has many bugfixes and other small improvements over 3.4.2.

Issue 6639: Module-level turtle functions no longer raise TclError after closing \ 
the window.
Issues 814253, 9179: Warnings now are raised when group references and \ 
conditional group references are used in lookbehind assertions in regular \ 
expressions.
Issue 23215: Multibyte codecs with custom error handlers that ignores errors \ 
consumed too much memory and raised SystemError or MemoryError. Original patch \ 
by Aleksi Torhamo.
Issue 5700: io.FileIO() called flush() after closing the file. flush() was not \ 
called in close() if closefd=False.
Issue 23374: Fixed pydoc failure with non-ASCII files when stdout encoding \ 
differs from file system encoding (e.g. on Mac OS).
Issue 23481: Remove RC4 from the SSL module’s default cipher list.
Issue 21548: Fix pydoc.synopsis() and pydoc.apropos() on modules with empty \ 
docstrings.
Issue 22885: Fixed arbitrary code execution vulnerability in the dbm.dumb \ 
module. Original patch by Claudiu Popa.
Issue 23146: Fix mishandling of absolute Windows paths with forward slashes in \ 
pathlib.
Issue 23421: Fixed compression in tarfile CLI. Patch by wdv4758h.
Issue 23361: Fix possible overflow in Windows subprocess creation code.