Dartdoc should sort constructors by constructorName, not by class name

pkg/dartdoc/lib/dartdoc.dart

 // 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.
 
 /**
  * To generate docs for a library, run this script with the path to an
  * entrypoint .dart file, like:
  *
  *     $ dart dartdoc.dart foo.dart
  *
@@ skipping 966 matching lines @@
   void docConstructors(InterfaceMirror type) {
     final constructors = <MethodMirror>[];
     for (var constructor in type.constructors.getValues()) {
        if (!constructor.isPrivate) {
          constructors.add(constructor);
        }
     }
 
     if (constructors.length > 0) {
       writeln('<h3>Constructors</h3>');
-      constructors.sort((x, y) => x.simpleName.toUpperCase().compareTo(
-                                  y.simpleName.toUpperCase()));
+      constructors.sort((x, y) => x.constructorName.toUpperCase().compareTo(
+                                  y.constructorName.toUpperCase()));
 
       for (final constructor in constructors) {
         docMethod(type, constructor);
       }
     }
   }
 
   void docMembers(ObjectMirror host) {
     // Collect the different kinds of members.
     final staticMethods = [];
@@ skipping 576 matching lines @@
 
 /**
  * Used to report an unexpected error in the DartDoc tool or the
  * underlying data
  */
 class InternalError {
   final String message;
   const InternalError(this.message);
   String toString() => "InternalError: '$message'";
 }