Clarify the docs of `teloxide::handler!`
@@ -192,6 +192,8 @@ where
///
/// - For `State::MyVariant(param)` and `State::MyVariant { param }`, the
/// payload is `param`.
+/// - For `State::MyVariant(param,)` and `State::MyVariant { param, }`, the
+/// payload is `(param,)`.
/// - For `State::MyVariant(param1, ..., paramN)` and `State::MyVariant {
/// param1, ..., paramN }`, the payload is `(param1, ..., paramN)` (where `N`
/// > 1).
