fix doc error (#195)

actix-service/src/and_then.rs

@@ -9,7 +9,7 @@ use super::{Service, ServiceFactory};
 /// Service for the `and_then` combinator, chaining a computation onto the end
 /// of another service which completes successfully.
 ///
-/// This is created by the `ServiceExt::and_then` method.
+/// This is created by the `Pipeline::and_then` method.
 pub(crate) struct AndThenService<A, B>(Rc<RefCell<(A, B)>>);
 
 impl<A, B> AndThenService<A, B> {

actix-service/src/apply.rs

@@ -5,7 +5,7 @@ use std::task::{Context, Poll};
 
 use super::{IntoService, IntoServiceFactory, Service, ServiceFactory};
 
-/// Apply tranform function to a service.
+/// Apply transform function to a service.
 pub fn apply_fn<T, F, R, In, Out, Err, U>(service: U, f: F) -> Apply<T, F, R, In, Out, Err>
 where
     T: Service<Error = Err>,
@@ -16,7 +16,7 @@ where
     Apply::new(service.into_service(), f)
 }
 
-/// Service factory that prodices `apply_fn` service.
+/// Service factory that produces `apply_fn` service.
 pub fn apply_fn_factory<T, F, R, In, Out, Err, U>(
     service: U,
     f: F,

actix-service/src/transform.rs

@@ -115,7 +115,7 @@ pub trait Transform<S> {
     /// Creates and returns a new Transform component, asynchronously
     fn new_transform(&self, service: S) -> Self::Future;
 
-    /// Map this transforms's factory error to a different error,
+    /// Map this transform's factory error to a different error,
     /// returning a new transform service factory.
     fn map_init_err<F, E>(self, f: F) -> TransformMapInitErr<Self, S, F, E>
     where