[issue3591] elementtree tests do not include bytes handling

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


----------
nosy: +eli.bendersky, serhiy.storchaka

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3591>
_______________________________________