Fix some bad documentation links.

sdk/lib/core/uri.dart

Index: sdk/lib/core/uri.dart
diff --git a/sdk/lib/core/uri.dart b/sdk/lib/core/uri.dart
index c1213e98617d5dee8fa354511436474243e8eb6c..dbda00a3ed0155bbe1dc2a2b171ce873ca9ea0c9 100644
--- a/sdk/lib/core/uri.dart
+++ b/sdk/lib/core/uri.dart
@@ -283,7 +283,7 @@ abstract class Uri {
    * that name is looked up using [Encoding.getByName],
    * and if the lookup returns an encoding, that encoding is used to convert
    * [content] to bytes.
-   * If providing both an [encoding] and a charset [parameter], they should
+   * If providing both an [encoding] and a charset in [parameters], they should
    * agree, otherwise decoding won't be able to use the charset parameter
    * to determine the encoding.
    *