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

pkg/analyzer/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 {
 
@@ skipping 15 matching lines @@
   }
 
   void addSpaces(int n, {breakWeight: DEFAULT_SPACE_WEIGHT}) {
     tokens.add(new SpaceToken(n, breakWeight: breakWeight));
   }
 
   void addToken(LineToken token) {
     tokens.add(token);
   }
 
+  void clear() {
+    tokens.clear();
+  }
+
   bool isEmpty() => tokens.isEmpty;
 
   bool isWhitespace() => tokens.every(
       (tok) => tok is SpaceToken || tok is TabToken);
 
   void indent(int n) {
     tokens.insert(0,
         useTabs ? new TabToken(n) : new SpaceToken(n * spacesPerIndent));
   }
 
@@ skipping 386 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();
 }