old_contents: # -----------------------------------------------------------------------------
  # Copyright (c) 2009-2016 Nicolas P. Rougier. All rights reserved.
  # Distributed under the (new) BSD License.
  # -----------------------------------------------------------------------------
  __backends__ = ('glfw',
                  'pyglet',
                  'sdl',
                  'sdl2',
                  'osxglut',
                  'freeglut',
                  'qt5',
                  'pyside')
  
new_contents: # -----------------------------------------------------------------------------
  # Copyright (c) 2009-2016 Nicolas P. Rougier. All rights reserved.
  # Distributed under the (new) BSD License.
  # -----------------------------------------------------------------------------
  __backends__ = ('glfw',
                  'pyglet',
                  'sdl',
                  'sdl2',
                  'osxglut',
                  'freeglut',
                  'qt5',
                  'pyside',
                  'pyside2')
  
subject: Update __init__.py