chore: fix typos (#3248)

actix-web/MIGRATION-4.0.md

@@ -372,13 +372,13 @@ You may need to review the [guidance on shared mutable state](https://docs.rs/ac
   HttpServer::new(|| {
 -     App::new()
 -         .data(MyState::default())
--         .service(hander)
+-         .service(handler)
 
 +     let my_state: Data<MyState> = Data::new(MyState::default());
 +
 +     App::new()
 +         .app_data(my_state)
-+         .service(hander)
++         .service(handler)
   })
 ```
 

actix-web/src/data.rs

@@ -69,7 +69,7 @@ pub(crate) type FnDataFactory =
 ///     HttpResponse::Ok()
 /// }
 ///
-/// /// Alteratively, use the `HttpRequest::app_data` method to access data in a handler.
+/// /// Alternatively, use the `HttpRequest::app_data` method to access data in a handler.
 /// async fn index_alt(req: HttpRequest) -> impl Responder {
 ///     let data = req.app_data::<Data<Mutex<MyData>>>().unwrap();
 ///     let mut my_data = data.lock().unwrap();

actix-web/src/guard/acceptable.rs

@@ -20,7 +20,7 @@ use crate::http::header::Accept;
 pub struct Acceptable {
     mime: mime::Mime,
 
-    /// Wether to match `*/*` mime type.
+    /// Whether to match `*/*` mime type.
     ///
     /// Defaults to false because it's not very useful otherwise.
     match_star_star: bool,

actix-web/src/guard/host.rs

@@ -2,7 +2,7 @@ use actix_http::{header, uri::Uri, RequestHead};
 
 use super::{Guard, GuardContext};
 
-/// Creates a guard that matches requests targetting a specific host.
+/// Creates a guard that matches requests targeting a specific host.
 ///
 /// # Matching Host
 /// This guard will: