Fix confusion between parameters vs arguments in parser.

pkg/analyzer/test/generated/parser_test.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.test.generated.parser_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
@@ skipping 7118 matching lines @@
   }
 
   void test_parseCompilationUnitMember_function_generic_noReturnType() {
     enableGenericMethods = true;
     FunctionDeclaration declaration = parse("parseCompilationUnitMember",
         <Object>[emptyCommentAndMetadata()], "f<E>() {}");
     expect(declaration.returnType, isNull);
     expect(declaration.functionExpression.typeParameters, isNotNull);
   }
 
+  void
+      test_parseCompilationUnitMember_function_generic_noReturnType_annotated() {
+    enableGenericMethods = true;
+    FunctionDeclaration declaration = parse("parseCompilationUnitMember",
+        <Object>[emptyCommentAndMetadata()], "f<@a E>() {}");
+    expect(declaration.returnType, isNull);
+    expect(declaration.functionExpression.typeParameters, isNotNull);
+  }
+
   void test_parseCompilationUnitMember_function_generic_returnType() {
     enableGenericMethods = true;
     FunctionDeclaration declaration = parse("parseCompilationUnitMember",
         <Object>[emptyCommentAndMetadata()], "E f<E>() {}");
     expect(declaration.returnType, isNotNull);
     expect(declaration.functionExpression.typeParameters, isNotNull);
   }
 
   void test_parseCompilationUnitMember_function_generic_void() {
     enableGenericMethods = true;
@@ skipping 4344 matching lines @@
         new Scanner(null, new CharSequenceReader(source), listener);
     Token tokenStream = scanner.tokenize();
     //
     // Parse the source.
     //
     Parser parser = new Parser(null, listener);
     return invokeParserMethodImpl(
         parser, methodName, <Object>[tokenStream], tokenStream) as Token;
   }
 }