doc improvements

docs/source/error_code_list.rst

@@ -1155,6 +1155,12 @@ See :ref:`overloading <function-overloading>` for more explanation.
 Check error code of overload function signature match
 --------------------------------------------------------------------------
 
+In the case of an overloaded function, if one of the signatures is never accessible, this error may occur.
+An example where this can occur is with the utilization of floats and int types, due to the behavior of integers matching floats in mypy.
+Consider swapping the declaration of the two types so that the narrower signature is declared before the broader signature.                
+
+Example:
+
 .. code-block:: python
 
     from typing import overload, Union