Initial indent fix and a few more tests.

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 60 matching lines @@
 class NewlineToken extends LineToken {
 
   NewlineToken(String value) : super(value);
 }
 
 
 
 class SourceWriter {
 
   final StringBuffer buffer = new StringBuffer();
-  Line currentLine = new Line();
+  Line currentLine;
 
   final String lineSeparator;
   int indentCount = 0;
 
-  SourceWriter({int initialIndent: 0, this.lineSeparator: '\n'}) :
-    indentCount = initialIndent;
+  SourceWriter({this.indentCount: 0, this.lineSeparator: '\n'}) {
+    currentLine = new Line(indent: indentCount);
+  }
 
   indent() {
     ++indentCount;
   }
 
   unindent() {
     --indentCount;
   }
 
   print(x) {
@@ skipping 73 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();
 }