backend_qt5.py Don't use six.u

jenshnielsen · jenshnielsen · commit b8cb0b3af0dd · 2014-08-10T11:08:01.000+01:00
This code already does from __future__ import unicode_literal. Thus '+' will be a unicode string even in python 2 and there is no need for converting it into a unicode string. Infact this results in a TypeError because six.u assumes the input string to be ASCII only. See http://pythonhosted.org/six/#six.u
diff --git a/lib/matplotlib/backends/backend_qt5.py b/lib/matplotlib/backends/backend_qt5.py
@@ -381,7 +381,7 @@ def _get_key(self, event):
                 key = key.lower()
 
         mods.reverse()
-        return six.u('+').join(mods + [key])
+        return '+'.join(mods + [key])
 
     def new_timer(self, *args, **kwargs):
         """
