Formatter sanity-checking (via token stream verification).

pkg/analyzer_experimental/lib/src/services/writer.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 source_writer;
 
 
 class Line {
 
   final int lineLength;
@@ skipping 67 matching lines @@
 
 
 class SourceWriter {
 
   final StringBuffer buffer = new StringBuffer();
   Line currentLine;
 
   final String lineSeparator;
   int indentCount = 0;
 
-  SourceWriter({this.indentCount: 0, this.lineSeparator: '\n'}) {
+  SourceWriter({this.indentCount: 0, this.lineSeparator: NEW_LINE}) {
     currentLine = new Line(indent: indentCount);
   }
 
   void indent() {
     ++indentCount;
   }
 
   void unindent() {
     --indentCount;
   }
@@ skipping 33 matching lines @@
   String toString() {
     var source = new StringBuffer(buffer.toString());
     if (!currentLine.isWhitespace()) {
       source.write(currentLine);
     }
     return source.toString();
   }
 
 }
 
-
+const NEW_LINE = '\n';
 const SPACE = ' ';
 const SPACES = const [
           '',
           ' ',
           '  ',
           '   ',
           '    ',
           '     ',
           '      ',
           '       ',
@@ skipping 33 matching lines @@
 
 String getTabs(int n) => n < TABS.length ? TABS[n] : repeat('\t', n);
 
 String repeat(String ch, int times) {
   var sb = new StringBuffer();
   for (var i = 0; i < times; ++i) {
     sb.write(ch);
   }
   return sb.toString();
 }