Update Doc/reference/compound_stmts.rst

Author: pablogsal

Doc/reference/compound_stmts.rst

@@ -249,8 +249,7 @@ An expression-less :keyword:`!except` clause, if present, must be last;
 it matches any exception.
 
 For an :keyword:`!except` clause with an expression, the
-expression must evaluate to an exception type or a tuple of exception types. Parentheses
-can be dropped if multiple exception types are provided and the ``as`` clause is not used.
+expression must evaluate to an exception type or a tuple of exception types. If multiple exception types are provided as a tuple expression, then parentheses are required if the ``as`` clause is used.
 The raised exception matches an :keyword:`!except` clause whose expression evaluates
 to the class or a :term:`non-virtual base class <abstract base class>` of the exception object,
 or to a tuple that contains such a class.