update docs

CHANGES.md

@@ -13,6 +13,8 @@
 * Rename `Accept::{mime_preference => preference}`. [#2480]
 * Un-deprecate `App::data_factory`. [#2484]
 * `HttpRequest::url_for` no longer constructs URLs with query or fragment components. [#2430]
+* Remove `B` (body) type parameter on `App`. [#2493]
+* Add `B` (body) type parameter on `Scope`. [#2492]
 
 ### Fixed
 * Accept wildcard `*` items in `AcceptLanguage`. [#2480]
@@ -25,6 +27,8 @@
 [#2482]: https://github.com/actix/actix-web/pull/2482
 [#2484]: https://github.com/actix/actix-web/pull/2484
 [#2485]: https://github.com/actix/actix-web/pull/2485
+[#2492]: https://github.com/actix/actix-web/pull/2492
+[#2493]: https://github.com/actix/actix-web/pull/2493
 
 
 ## 4.0.0-beta.13 - 2021-11-30

src/scope.rs

@@ -298,13 +298,9 @@ where
         self
     }
 
-    /// Registers middleware, in the form of a middleware component (type),
+    /// Registers middleware, in the form of a middleware component (type), that runs during inbound
-    /// that runs during inbound processing in the request
+    /// processing in the request life-cycle (request -> response), modifying request as necessary,
-    /// life-cycle (request -> response), modifying request as
+    /// across all requests managed by the *Scope*.
-    /// necessary, across all requests managed by the *Scope*.  Scope-level
-    /// middleware is more limited in what it can modify, relative to Route or
-    /// Application level middleware, in that Scope-level middleware can not modify
-    /// ServiceResponse.
     ///
     /// Use middleware when you need to read or modify *every* request in some way.
     pub fn wrap<M, B1>(
@@ -342,13 +338,11 @@ where
         }
     }
 
-    /// Registers middleware, in the form of a closure, that runs during inbound
+    /// Registers middleware, in the form of a closure, that runs during inbound processing in the
-    /// processing in the request life-cycle (request -> response), modifying
+    /// request life-cycle (request -> response), modifying request as necessary, across all
-    /// request as necessary, across all requests managed by the *Scope*.
+    /// requests managed by the *Scope*.
-    /// Scope-level middleware is more limited in what it can modify, relative
-    /// to Route or Application level middleware, in that Scope-level middleware
-    /// can not modify ServiceResponse.
     ///
+    /// # Examples
     /// ```
     /// use actix_service::Service;
     /// use actix_web::{web, App};