docs/2016-11-03-routing.md

@@ -39,8 +39,8 @@ two floors/levels <b>must</b> be a separate room. Further, that room
 </div>
 
 
-If there are two points with the same ($$x, y$$)-coordinates, which differ 
-only in the $$z$$-coordinate, the router will face problems, thus we defined 
+If there are two points with the same ($`x, y`$)-coordinates, which differ 
+only in the $`z`$-coordinate, the router will face problems, thus we defined 
 the restriction above. That should avoid any such cases.
 
 The floorfield router provides one mode: ```ff_global_shortest```