docgen: use https:// over git://

pkg/docgen/lib/docgen.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.
 
 /// **docgen** is a tool for creating machine readable representations of Dart
 /// code metadata, including: classes, members, comments and annotations.
 ///
 /// docgen is run on a `.dart` file or a directory containing `.dart` files.
 ///
 ///      $ dart docgen.dart [OPTIONS] [FILE/DIR]
@@ skipping 705 matching lines @@
   }
 
   /// Serve up our generated documentation for viewing in a browser.
   static void _clone() {
     // If the viewer code is already there, then don't clone again.
     if (_dartdocViewerDir.existsSync()) {
       _moveDirectoryAndServe();
     }
     else {
       var processResult = Process.runSync('git', ['clone', '-b', 'master',
-          'git://github.com/dart-lang/dartdoc-viewer.git'],
+          'https://github.com/dart-lang/dartdoc-viewer.git'],
           runInShell: true);
 
       if (processResult.exitCode == 0) {
         /// Move the generated json/yaml docs directory to the dartdoc-viewer
         /// directory, to run as a webpage.
         var processResult = Process.runSync(_Generator._pubScript,
             ['upgrade'], runInShell: true,
             workingDirectory: viewerCodePath);
         print('process output: ${processResult.stdout}');
         print('process stderr: ${processResult.stderr}');
@@ skipping 1571 matching lines @@
         .map((e) => originalMirror.getField(e.simpleName).reflectee)
         .where((e) => e != null)
         .toList();
   }
 
   Map toMap() => {
     'name': Indexable.getDocgenObject(mirror, owningLibrary).docName,
     'parameters': parameters
   };
 }