Issue 13584. Fix for Java/Dart local variable scoping mismatch.

pkg/analyzer_experimental/test/generated/scanner_test.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 library engine.scanner_test;
 import 'package:analyzer_experimental/src/generated/java_core.dart';
 import 'package:analyzer_experimental/src/generated/java_junit.dart';
 import 'package:analyzer_experimental/src/generated/source.dart';
 import 'package:analyzer_experimental/src/generated/error.dart';
 import 'package:analyzer_experimental/src/generated/scanner.dart';
 import 'package:unittest/unittest.dart' as _ut;
 import 'test_support.dart';
@@ skipping 2071 matching lines @@
   /**
    * Assert that scanning the given source produces an error with the given code.
    *
    * @param illegalCharacter
    * @param i
    * @param source the source to be scanned to produce the error
    */
   void assertError(ScannerErrorCode expectedError, int expectedOffset, String source) {
     GatheringErrorListener listener = new GatheringErrorListener();
     scan(source, listener);
-    listener.assertErrors([new AnalysisError.con2(null, expectedOffset, 1, expectedError, [(source.codeUnitAt(expectedOffset) as int)])]);
+    listener.assertErrors([new AnalysisError.con2(null, expectedOffset, 1, expectedError, [source.codeUnitAt(expectedOffset) as int])]);
   }
 
   /**
    * Assert that when scanned the given source contains a single keyword token with the same lexeme
    * as the original source.
    *
    * @param source the source to be scanned
    */
   void assertKeywordToken(String source) {
     Token token = scan2(source);
@@ skipping 117 matching lines @@
     this._lineNumber = lineNumber;
     this._columnNumber = columnNumber;
   }
 }
 main() {
   CharBufferScannerTest.dartSuite();
   KeywordStateTest.dartSuite();
   StringScannerTest.dartSuite();
   TokenTypeTest.dartSuite();
 }