pkg/docgen: update markdown to 0.5.1

third_party/pkg/markdown/lib/src/document.dart

Index: third_party/pkg/markdown/lib/src/document.dart
diff --git a/third_party/pkg/markdown/lib/markdown.dart b/third_party/pkg/markdown/lib/src/document.dart
similarity index 67%
copy from third_party/pkg/markdown/lib/markdown.dart
copy to third_party/pkg/markdown/lib/src/document.dart
index 01de970769cb40b9207ad92615fbb42c3a7e0cc7..7ed01ca8f61a49eae1f78472cad4f1bdc15dd60d 100644
--- a/third_party/pkg/markdown/lib/markdown.dart
+++ b/third_party/pkg/markdown/lib/src/document.dart
@@ -1,36 +1,8 @@
-// Copyright (c) 2012, 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 markdown.document;
 
-/// Parses text in a markdown-like format and renders to HTML.
-library markdown;
-
-// TODO(rnystrom): Use "package:" URL (#4968).
-part 'src/markdown/ast.dart';
-part 'src/markdown/block_parser.dart';
-part 'src/markdown/html_renderer.dart';
-part 'src/markdown/inline_parser.dart';
-
-typedef Node Resolver(String name);
-
-/// Converts the given string of markdown to HTML.
-String markdownToHtml(String markdown, {inlineSyntaxes, linkResolver}) {
-  final document = new Document(inlineSyntaxes: inlineSyntaxes,
-      linkResolver: linkResolver);
-
-  // Replace windows line endings with unix line endings, and split.
-  final lines = markdown.replaceAll('\r\n','\n').split('\n');
-  document.parseRefLinks(lines);
-  final blocks = document.parseLines(lines);
-  return renderToHtml(blocks);
-}
-
-/// Replaces `<`, `&`, and `>`, with their HTML entity equivalents.
-String escapeHtml(String html) {
-  return html.replaceAll('&', '&amp;')
-             .replaceAll('<', '&lt;')
-             .replaceAll('>', '&gt;');
-}
+import 'ast.dart';
+import 'block_parser.dart';
+import 'inline_parser.dart';
 
 /// Maintains the context needed to parse a markdown document.
 class Document {