Don't include parameter names in types, don't use Unicode arrow.

pkg/analyzer/test/src/task/strong/front_end_inference_test.dart

 // Copyright (c) 2017, 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:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
@@ skipping 145 matching lines @@
       first = false;
     }
     buffer.write(close);
   }
 
   void _appendParameters(
       StringBuffer buffer, List<ParameterElement> parameters) {
     _appendList<ParameterElement>(buffer, '(', ')', parameters, ', ',
         (parameter) {
       _appendType(buffer, parameter.type);
-      buffer.write(' ');
-      buffer.write(parameter.name);
     }, includeEmpty: true);
   }
 
   void _appendType(StringBuffer buffer, DartType type) {
     if (type is FunctionType) {
       Element element = type.element;
       _appendElementName(buffer, element);
       _appendTypeArguments(buffer, type.typeArguments);
       _appendParameters(buffer, type.parameters);
-      buffer.write(' → ');
+      buffer.write(' -> ');
       _appendType(buffer, type.returnType);
     } else if (type is InterfaceType) {
       ClassElement element = type.element;
       _appendElementName(buffer, element);
       _appendTypeArguments(buffer, type.typeArguments);
     } else {
       buffer.write(type.toString());
     }
   }
 
@@ skipping 113 matching lines @@
   void _recordType(int offset, DartType type) {
     _instrumentation.record(
         uri, offset, 'type', new _InstrumentationValueForType(type));
   }
 
   void _recordTypeArguments(int offset, List<DartType> typeArguments) {
     _instrumentation.record(uri, offset, 'typeArgs',
         new _InstrumentationValueForTypeArgs(typeArguments));
   }
 }