Change RangeError instances to use RangeError.range.

sdk/lib/convert/encoding.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.convert;
 
 /**
  * Open-ended Encoding enum.
  */
 abstract class Encoding extends Codec<String, List<int>> {
@@ skipping 51 matching lines @@
   * Gets an [Encoding] object from the name of the character set
   * name. The names used are the IANA official names for the
   * character set (see
   * http://www.iana.org/assignments/character-sets/character-sets.xml).
   *
   * The [name] passed is case insensitive.
   *
   * If character set is not supported [:null:] is returned.
   */
   static Encoding getByName(String name) {
-      if (name == null) return null;
-      name = name.toLowerCase();
-      return _nameToEncoding[name];
+    if (name == null) return null;
+    name = name.toLowerCase();
+    return _nameToEncoding[name];
   }
 }