Document IZone (#2266)

Author: Gold856

source/docs/software/advanced-controls/controllers/pidcontroller.rst

@@ -143,7 +143,6 @@ By default, ``IZone`` is disabled.
     pid.setIZone(2);
 
   .. code-tab:: c++
-
     // Disable IZone
     pid.SetIZone(std::numeric_limits<double>::infinity());