show the enableAssertInitializer setting in the diagnostics page

pkg/analysis_server/lib/src/status/get_handler2.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:convert';
 import 'dart:io';
 import 'dart:math';
 
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
@@ skipping 423 matching lines @@
 
     void writeOptions(StringBuffer buffer, AnalysisOptionsImpl options,
         {void writeAdditionalOptions(StringBuffer buffer)}) {
       if (options == null) {
         buffer.write('<p>No option information available.</p>');
         return;
       }
       buffer.write('<p>');
       _writeOption(
           buffer, 'Analyze functon bodies', options.analyzeFunctionBodies);
+      _writeOption(buffer, 'Enable asserts in initializer lists',
+          options.enableAssertInitializer);
       _writeOption(
           buffer, 'Enable strict call checks', options.enableStrictCallChecks);
       _writeOption(buffer, 'Enable super mixins', options.enableSuperMixins);
       _writeOption(buffer, 'Generate dart2js hints', options.dart2jsHint);
       _writeOption(buffer, 'Generate errors in implicit files',
           options.generateImplicitErrors);
       _writeOption(
           buffer, 'Generate errors in SDK files', options.generateSdkErrors);
       _writeOption(buffer, 'Generate hints', options.hint);
       _writeOption(buffer, 'Incremental resolution', options.incremental);
@@ skipping 840 matching lines @@
       String path, Map<String, String> params, String innerHtml,
       [bool hasError = false]) {
     Uri uri = params.isEmpty
         ? new Uri(path: path)
         : new Uri(path: path, queryParameters: params);
     String href = HTML_ESCAPE.convert(uri.toString());
     String classAttribute = hasError ? ' class="error"' : '';
     return '<a href="$href" $classAttribute>$innerHtml</a>';
   }
 }