Fix for getAnalysisContext()

pkg/analysis_server/lib/src/analysis_server.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.
 
 library analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 666 matching lines @@
     return folderMap.values;
   }
 
   /**
    * Return the [AnalysisContext] that is used to analyze the given [path].
    * Return `null` if there is no such context.
    */
   AnalysisContext getAnalysisContext(String path) {
     // try to find a containing context
     for (Folder folder in folderMap.keys) {
-      if (path.startsWith(folder.path)) {
+      if (folder.contains(path)) {
         return folderMap[folder];
       }
     }
     // check if there is a context that analyzed this source
     Source source = getSource(path);
     for (AnalysisContext context in folderMap.values) {
       SourceKind kind = context.getKindOf(source);
       if (kind != null) {
         return context;
       }
@@ skipping 235 matching lines @@
     // send the notification
     channel.sendNotification(
         new ServerErrorParams(
             true,
             exceptionString,
             stackTraceString).toNotification());
   }
 }
 
 typedef void OptionUpdater(AnalysisOptionsImpl options);