gitedit.py: Explicitly convert strings to utf-8 byte arrays
gitedit.py: Explicitly convert strings to utf-8 byte arrays

The Gio OutputStream buffer argument must be a bytes buffer object. In
python 2 there was an automatic conversion, but in Python 3 this
encoding conversion must be done explicitly.

Signed-off-by: Darren Hart (VMware) <38f9eaa30910c40b06f5a60020b1222f2a953801@infradead.org>

dvhart/gedit-git-plugin