Replace ${name} with $name where possible.

pkg/analyzer/lib/src/generated/html.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.html;
 
 import 'dart:collection';
@@ skipping 230 matching lines @@
             int tagStart = offset;
             c = advance();
             while (Character.isLetterOrDigit(c) || c == 0x2D || c == 0x5F) {
               c = advance();
             }
             _emitWithOffsetAndLength(TokenType.TAG, tagStart, -1);
             // check tag against passThrough elements
             String tag = _tail.lexeme;
             for (String str in _passThroughElements) {
               if (str == tag) {
-                endPassThrough = "</${str}>";
+                endPassThrough = "</$str>";
                 break;
               }
             }
           }
         }
       } else if (c == 0x3E) {
         _emitWithOffset(TokenType.GT, start);
         inBrackets = false;
         c = advance();
         // if passThrough != null, read until we match it
@@ skipping 1775 matching lines @@
  */
 abstract class XmlVisitor<R> {
   R visitHtmlScriptTagNode(HtmlScriptTagNode node);
 
   R visitHtmlUnit(HtmlUnit htmlUnit);
 
   R visitXmlAttributeNode(XmlAttributeNode xmlAttributeNode);
 
   R visitXmlTagNode(XmlTagNode xmlTagNode);
 }