diff --git a/torus.py b/torus.py
index b351146..51bd63e 100644
--- a/torus.py
+++ b/torus.py
@@ -342,13 +342,12 @@ class InteractiveImage(Image):
                 valmax=1,
                 valinit=rfrac_init,
                 orientation="vertical"
-            ), 
+            ),
             button_reset=Button(ax3, 'Reset', hovercolor='0.975'),
         )
         self.interactions['slider_sun'].on_changed(self._slider_update_sun)
         self.interactions['slider_rfrac'].on_changed(self._slider_update_torus)
         self.interactions['button_reset'].on_clicked(self._reset)
-        
 
     def _slider_update_torus(self, val):
         self.update_torus(val)