pep8 fix for kivy/uix/__init__.py
pep8 fixes for kivy/uix/accordion.py
pep8 fixes for kivy/uix/actionbar.py
pep8 fixes for kivy/uix/anchorlayout.py
pep8 fixes for kivy/uix/behaviors.py
pep8 fixes for kivy/uix/actionbar.py
pep8 fixes for kivy/uix/bubble.py