Clean up package imports and library names

pkg/analyzer/lib/src/codegen/text_formatter.dart

 // Copyright (c) 2014, 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.
 
 /**
  * Code for converting HTML into text, for use during code generation of
  * analyzer and analysis server.
  */
 library analyzer.src.codegen.text_formatter;
 
+import 'package:analyzer/src/codegen/tools.dart';
 import 'package:html/dom.dart' as dom;
 
-import 'tools.dart';
-
 final RegExp whitespace = new RegExp(r'\s');
 
 /**
  * Convert the HTML in [desc] into text, word wrapping at width [width].
  *
  * If [javadocStyle] is true, then the output is compatable with Javadoc,
  * which understands certain HTML constructs.
  */
 String nodesToText(List<dom.Node> desc, int width, bool javadocStyle,
     {bool removeTrailingNewLine: false}) {
@@ skipping 213 matching lines @@
           writeln(line);
           line = word;
         }
       } else {
         line = word;
       }
       word = '';
     }
   }
 }