Rename dx and dy parameters in on_mouse_scroll to scroll_x and scroll_y to prevent confusion with dx/dy from other mouse events.  This affects documentation only, the interface is identical.
Rename dx and dy parameters in on_mouse_scroll to scroll_x and scroll_y to
prevent confusion with dx/dy from other mouse events.  This affects
documentation only, the interface is identical.

kmonsoor/pyglet,mpasternak/michaldtz-fix-552,cledio66/pyglet,mpasternak/michaldtz-fixes-518-522,mpasternak/pyglet-fix-issue-518-522,xshotD/pyglet,Austin503/pyglet,shaileshgoogler/pyglet,mpasternak/michaldtz-fix-552,qbektrix/pyglet,shaileshgoogler/pyglet,kmonsoor/pyglet,xshotD/pyglet,Austin503/pyglet,gdkar/pyglet,odyaka341/pyglet,arifgursel/pyglet,google-code-export/pyglet,odyaka341/pyglet,arifgursel/pyglet,google-code-export/pyglet,qbektrix/pyglet,shaileshgoogler/pyglet,google-code-export/pyglet,mpasternak/michaldtz-fixes-518-522,Alwnikrotikz/pyglet,xshotD/pyglet,Alwnikrotikz/pyglet,arifgursel/pyglet,Austin503/pyglet,mpasternak/michaldtz-fix-552,odyaka341/pyglet,mpasternak/michaldtz-fixes-518-522,mpasternak/pyglet-fix-issue-518-522,google-code-export/pyglet,shaileshgoogler/pyglet,mpasternak/pyglet-fix-issue-518-522,kmonsoor/pyglet,odyaka341/pyglet,google-code-export/pyglet,cledio66/pyglet,shaileshgoogler/pyglet,arifgursel/pyglet,xshotD/pyglet,kmonsoor/pyglet,mpasternak/pyglet-fix-issue-518-522,gdkar/pyglet,mpasternak/michaldtz-fix-552,Austin503/pyglet,gdkar/pyglet,qbektrix/pyglet,Alwnikrotikz/pyglet,Alwnikrotikz/pyglet,qbektrix/pyglet,mpasternak/pyglet-fix-issue-552,gdkar/pyglet,Austin503/pyglet,gdkar/pyglet,cledio66/pyglet,kmonsoor/pyglet,odyaka341/pyglet,arifgursel/pyglet,Alwnikrotikz/pyglet,xshotD/pyglet,cledio66/pyglet,mpasternak/pyglet-fix-issue-552,mpasternak/pyglet-fix-issue-552,mpasternak/michaldtz-fixes-518-522,qbektrix/pyglet,cledio66/pyglet,mpasternak/pyglet-fix-issue-552