Format code in analysis_server

pkg/analysis_server/lib/src/services/dependencies/reachable_source_collector.dart

 // Copyright (c) 2015, 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 services.dependencies.reachable_source_collector;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 15 matching lines @@
     }
   }
 
   /// Collect reachable sources.
   Map<String, List<String>> collectSources() {
     _addDependencies(source);
     return _sourceMap;
   }
 
   void _addDependencies(Source source) {
-
     String sourceUri = source.uri.toString();
 
     // Careful not to revisit.
     if (_sourceMap[source.uri.toString()] != null) {
       return;
     }
 
     List<Source> sources = <Source>[];
     sources.addAll(context.computeResult(source, IMPORTED_LIBRARIES));
     sources.addAll(context.computeResult(source, EXPORTED_LIBRARIES));
 
     _sourceMap[sourceUri] =
         sources.map((source) => source.uri.toString()).toList();
 
     sources.forEach((s) => _addDependencies(s));
   }
 }