Use hanging indentation when code generating Javadoc @params.

pkg/analysis_server/tool/spec/text_formatter.dart

 // Copyright (c) 2014, 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.
 
 /**
  * Code for converting HTML into text, for use in doc comments.
  */
 library text.formatter;
 
 import 'package:html5lib/dom.dart' as dom;
@@ skipping 101 matching lines @@
         case 'dt':
         case 'h1':
         case 'h2':
         case 'h3':
         case 'h4':
         case 'p':
           lineBreak(true);
           addAll(node.nodes);
           lineBreak(true);
           break;
+        case 'div':
+          lineBreak(false);
+          if (node.classes.contains('hangingIndent')) {
+            resolveVerticalSpace();
+            indentSpecial('', '        ', () {
+              addAll(node.nodes);
+              lineBreak(false);
+            });
+          } else {
+            addAll(node.nodes);
+            lineBreak(false);
+          }
+          break;
         case 'ul':
           lineBreak(false);
           addAll(node.nodes);
           lineBreak(false);
           break;
         case 'li':
           lineBreak(false);
           resolveVerticalSpace();
           indentSpecial('- ', '  ', () {
             addAll(node.nodes);
@@ skipping 92 matching lines @@
 
   /**
    * Process a list of HTML nodes.
    */
   void addAll(List<dom.Node> nodes) {
     for (dom.Node node in nodes) {
       add(node);
     }
   }
 }