win, gitpython-developers#519: Change default-encoding to locale.getpreferredencoding()

+ On Windows, this is the default encoding (usually, the mate-encoding
`mcbs' which points to the current code-page (i.e. `cp1252` for Europe).

Author: ankostis

git/compat.py

@@ -4,6 +4,7 @@
 #
 # This module is part of GitPython and is released under
 # the BSD License: http://www.opensource.org/licenses/bsd-license.php
+import locale
 """utilities to help provide compatibility with python 3"""
 # flake8: noqa
 
@@ -28,7 +29,7 @@
 is_win = (os.name == 'nt')
 is_posix = (os.name == 'posix')
 is_darwin = (os.name == 'darwin')
-defenc = sys.getdefaultencoding()
+defenc = locale.getpreferredencoding(False) if is_win else sys.getdefaultencoding()
 
 if PY3:
     import io