Convert /** comments to /// in pub.

utils/pub/source_registry.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.
 
 library source_registry;
 
 import 'source.dart';
 
-/**
- * A class that keeps track of [Source]s used for installing packages.
- */
+/// A class that keeps track of [Source]s used for installing packages.
 class SourceRegistry {
   final Map<String, Source> _map;
   Source _default;
 
-  /**
-   * Creates a new registry with no packages registered.
-   */
+  /// Creates a new registry with no packages registered.
   SourceRegistry() : _map = <String, Source>{};
 
-  /**
-   * Returns the default source, which is used when no source is specified.
-   */
+  /// Returns the default source, which is used when no source is specified.
   Source get defaultSource => _default;
 
-  /**
-   * Sets the default source. This takes a string, which must be the name of a
-   * registered source.
-   */
+  /// Sets the default source. This takes a string, which must be the name of a
+  /// registered source.
   void setDefault(String name) {
     if (!_map.containsKey(name)) {
       // TODO(nweiz): Real error-handling system
       throw 'Default source $name is not in the registry';
     }
 
     _default = _map[name];
   }
 
-  /**
-   * Registers a new source. This source may not have the same name as a source
-   * that's already been registered.
-   */
+  /// Registers a new source. This source may not have the same name as a source
+  /// that's already been registered.
   void register(Source source) {
     if (_map.containsKey(source.name)) {
       // TODO(nweiz): Real error-handling system
       throw 'Source registry already has a source named ${source.name}';
     }
 
     _map[source.name] = source;
   }
 
-  /**
-   * Returns `true` if there is a source named [name].
-   */
+  /// Returns `true` if there is a source named [name].
   bool contains(String name) => _map.containsKey(name);
 
-  /**
-   * Returns the source named [name]. Throws an error if no such source has been
-   * registered. If [name] is null, returns the default source.
-   */
+  /// Returns the source named [name]. Throws an error if no such source has
+  /// been registered. If [name] is null, returns the default source.
   Source operator[](String name) {
     if (name == null) {
       if (defaultSource != null) return defaultSource;
       // TODO(nweiz): Real error-handling system
       throw 'No default source has been registered';
     }
     if (_map.containsKey(name)) return _map[name];
     throw 'No source named $name is registered';
   }
 }