remove spaces at end of line (linter complains)

Author: NSoiffer

addon/globalPlugins/MathCAT/MathCAT.py

@@ -300,7 +300,7 @@ def script_navigate(self, gesture: KeyboardInputGesture):
 
         if not braille.handler.enabled:
             return
-        
+
         try:
             # update the braille to reflect the nav position (might be excess code, but it works)
             nav_node = libmathcat.GetNavigationMathMLId()