Update advanced.rst

docs/advanced.rst

@@ -69,7 +69,7 @@ Applying :ref:`trailing losses<trailing>` is on by default, but it can be turned
 Turning off Detection Efficiency/Applying the Fading Function
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The :ref:`survey detection efficiency<fading>` is disabled if the fading function section of the config file is not included or left empty (When fadind_function_width and fadind_function_peak_efficency have not been given).
+The :ref:`survey detection efficiency<fading>` is disabled if the fading function section of the config file is removed or not included (When fadind_function_width and fadind_function_peak_efficency have not been given).
 
 Turning Off the Camera Footprint Filter
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~