Fix for detecting lib/src. Sort fixes by relevance.

pkg/analysis_server/lib/src/edit/edit_domain.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 edit.domain;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/edit/assist/assist_core.dart';
 import 'package:analysis_server/plugin/edit/assist/assist_dart.dart';
@@ skipping 182 matching lines @@
           if (errorLine == requestLine) {
             var context = new _DartFixContextImpl(
                 server.resourceProvider,
                 result.driver.getTopLevelNameDeclarations,
                 resolutionMap.elementDeclaredByCompilationUnit(unit).context,
                 unit,
                 error);
             List<Fix> fixes =
                 await new DefaultFixContributor().internalComputeFixes(context);
             if (fixes.isNotEmpty) {
+              fixes.sort(Fix.SORT_BY_RELEVANCE);
               AnalysisError serverError =
                   newAnalysisError_fromEngine(lineInfo, error);
               AnalysisErrorFixes errorFixes =
                   new AnalysisErrorFixes(serverError);
               errorFixesList.add(errorFixes);
               fixes.forEach((fix) {
                 errorFixes.fixes.add(fix.change);
               });
             }
           }
@@ skipping 755 matching lines @@
     }
     return new RefactoringStatus();
   }
 }
 
 /**
  * [_RefactoringManager] throws instances of this class internally to stop
  * processing in a manager that was reset.
  */
 class _ResetError {}