Formatter: don't indent EOL comment at the beginning of a line.

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.
 
 library formatter_test;
 
 import 'dart:io';
 
 import 'package:path/path.dart';
 import 'package:unittest/unittest.dart';
@@ skipping 166 matching lines @@
           '}\n',
           'library foo;\n'
           '\n'
           '//comment one\n'
           '\n'
           '//comment two\n'
           '\n'
           'class C {\n'
           '}\n'
       );
+      expectCUFormatsTo(
+          'main() {\n'
+          '//  print(1);\n'
+          '//  print(2);\n'
+          '  print(3);\n'
+          '}\n',
+          'main() {\n'
+          '//  print(1);\n'
+          '//  print(2);\n'
+          '  print(3);\n'
+          '}\n'
+      );
+      expectCUFormatsTo(
+          'class A {\n'
+          '//  int a;\n'
+          '//  int b;\n'
+          '  int c;\n'
+          '}\n',
+          'class A {\n'
+          '//  int a;\n'
+          '//  int b;\n'
+          '  int c;\n'
+          '}\n'
+      );
     });
 
     test('CU - nested functions', () {
       expectCUFormatsTo(
           'x() {\n'
           '  y() {\n'
           '  }\n'
           '}\n',
           'x() {\n'
           '  y() {\n'
@@ skipping 1287 matching lines @@
       input += lines[i++] + '\n';
     }
     while(++i < lines.length && !lines[i].startsWith('>>>')) {
       expectedOutput += lines[i] + '\n';
     }
     test('test - (${testIndex++})', () {
       expectClause(input, expectedOutput);
     });
   }
 }