fix doc comments in dart:io and collection types

sdk/lib/io/http.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 /**
  * HTTP status codes.
  */
 abstract class HttpStatus {
@@ skipping 1349 matching lines @@
 
   /**
    * Opens a HTTP connection.
    *
    * The HTTP method is specified in [method] and the URL to use in
    * [url].
    *
    * The `Host` header for the request will be set to the value
    * [Uri.host]:[Uri.port] from [url]. This can be overridden through the
    * [HttpClientRequest] interface before the request is sent.  NOTE
-   * if [host] is an IP address this will still be set in the `Host`
+   * if [Uri.host] is an IP address this will still be set in the `Host`
    * header.
    *
    * For additional information on the sequence of events during an
    * HTTP transaction, and the objects returned by the futures, see
    * the overall documentation for the class [HttpClient].
    */
   Future<HttpClientRequest> openUrl(String method, Uri url);
 
   /**
    * Opens a HTTP connection using the GET method.
@@ skipping 612 matching lines @@
 class RedirectException implements HttpException {
   final String message;
   final List<RedirectInfo> redirects;
 
   const RedirectException(this.message, this.redirects);
 
   String toString() => "RedirectException: $message";
 
   Uri get uri => redirects.last.location;
 }