Enable messages in asserts by default

pkg/analyzer/lib/error/error.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 analyzer.error.error;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/listener.dart';
@@ skipping 94 matching lines @@
   CompileTimeErrorCode.DUPLICATE_DEFINITION,
   CompileTimeErrorCode.DUPLICATE_DEFINITION_INHERITANCE,
   CompileTimeErrorCode.DUPLICATE_NAMED_ARGUMENT,
   CompileTimeErrorCode.DUPLICATE_PART,
   CompileTimeErrorCode.EXPORT_INTERNAL_LIBRARY,
   CompileTimeErrorCode.EXPORT_OF_NON_LIBRARY,
   CompileTimeErrorCode.EXTENDS_DEFERRED_CLASS,
   CompileTimeErrorCode.EXTENDS_DISALLOWED_CLASS,
   CompileTimeErrorCode.EXTENDS_ENUM,
   CompileTimeErrorCode.EXTENDS_NON_CLASS,
-  CompileTimeErrorCode.EXTRA_ARGUMENT_TO_ASSERT,
   CompileTimeErrorCode.EXTRA_POSITIONAL_ARGUMENTS,
   CompileTimeErrorCode.FIELD_INITIALIZED_BY_MULTIPLE_INITIALIZERS,
   CompileTimeErrorCode.FIELD_INITIALIZED_IN_PARAMETER_AND_INITIALIZER,
   CompileTimeErrorCode.FIELD_INITIALIZER_FACTORY_CONSTRUCTOR,
   CompileTimeErrorCode.FIELD_INITIALIZER_OUTSIDE_CONSTRUCTOR,
   CompileTimeErrorCode.FIELD_INITIALIZER_REDIRECTING_CONSTRUCTOR,
   CompileTimeErrorCode.FINAL_INITIALIZED_MULTIPLE_TIMES,
   CompileTimeErrorCode.GETTER_AND_METHOD_WITH_SAME_NAME,
   CompileTimeErrorCode.IMPLEMENTS_DEFERRED_CLASS,
   CompileTimeErrorCode.IMPLEMENTS_DISALLOWED_CLASS,
@@ skipping 770 matching lines @@
 
   @override
   int get hashCode => ordinal;
 
   @override
   int compareTo(ErrorProperty other) => ordinal - other.ordinal;
 
   @override
   String toString() => name;
 }