Dart SDK Spelling b, c, and d.

pkg/dev_compiler/tool/input_sdk/private/js_helper.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.
 
 library dart._js_helper;
 
 import 'dart:collection';
 
 import 'dart:_debugger' show stackTraceMapper;
 
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   const Returns(this.types);
 }
 
 /**
  * A metadata annotation placed on native methods and fields of native classes
  * to specify the JavaScript name.
  *
  * This example declares a Dart field + getter + setter called `$dom_title` that
  * corresponds to the JavaScript property `title`.
  *
- *     class Docmument native "*Foo" {
+ *     class Document native "*Foo" {
  *       @JSName('title')
  *       String $dom_title;
  *     }
  */
 class JSName {
   final String name;
   const JSName(this.name);
 }
 
 /**
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   // we have no way of telling the compiler yet, so it will generate an extra
   // layer of indirection that wraps the SyncIterator.
   _jsIterator() => JS('', '#(...#)', _generator, _args);
 
   Iterator<E> get iterator => new SyncIterator<E>(_jsIterator());
 }
 
 class BooleanConversionAssertionError extends AssertionError {
   toString() => 'Failed assertion: boolean expression must not be null';
 }