Whitespace testing fixes and bit-flip to turn on simple line breaking.

pkg/analyzer/test/services/formatter_test.dart

 // Copyright (c) 2013, 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:io';
 
 import 'package:path/path.dart';
 import 'package:unittest/unittest.dart';
 
 import 'package:analyzer/src/generated/java_core.dart' show CharSequence;
@@ skipping 1279 matching lines @@
     test('printLine - 3', () {
       var line = printLine(LINE_1, 8);
       expect(line, 'foo bar\nbaz foo\nbar baz');
     });
 
     test('printLine - 4', () {
       var line = printLine(LINE_1, 12);
       expect(line, 'foo bar baz\nfoo bar baz');
     });
 
+    test('isWhitespace', () {
+      expect(isWhitespace('foo'), false);
+      expect(isWhitespace('  foo'), false);
+      expect(isWhitespace('foo  '), false);
+      expect(isWhitespace(' foo '), false);
+      expect(isWhitespace(' '), true);
+      expect(isWhitespace('  '), true);
+      expect(isWhitespace('\t'), true);
+      expect(isWhitespace('\t\t'), true);
+      expect(isWhitespace('\n'), true);
+      expect(isWhitespace('\r'), true);
+    });
+
   });
 
   /// Helper method tests
   group('helpers', () {
 
     test('indentString', () {
       expect(getIndentString(0), '');
       expect(getIndentString(1), '  ');
       expect(getIndentString(4), '        ');
     });
@@ skipping 102 matching lines @@
       input += lines[i++] + '\n';
     }
     while(++i < lines.length && !lines[i].startsWith('>>>')) {
       expectedOutput += lines[i] + '\n';
     }
     test('test - (${testIndex++})', () {
       expectClause(input, expectedOutput);
     });
   }
 }