show the enableAssertInitializer setting in the diagnostics page

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

Index: pkg/analysis_server/lib/src/status/get_handler2.dart
diff --git a/pkg/analysis_server/lib/src/status/get_handler2.dart b/pkg/analysis_server/lib/src/status/get_handler2.dart
index 95d5c4e4bf939625563d9478714a408078777316..7d9b785c88fabc32816981c44fd002c0c23ae6aa 100644
--- a/pkg/analysis_server/lib/src/status/get_handler2.dart
+++ b/pkg/analysis_server/lib/src/status/get_handler2.dart
@@ -441,6 +441,8 @@ class GetHandler2 implements AbstractGetHandler {
       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);