Replace ${name} with $name where possible.

pkg/analyzer/lib/src/generated/sdk.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.sdk;
 
 import 'dart:collection';
@@ skipping 198 matching lines @@
    *
    * @return the library map describing the contents of the SDK
    */
   LibraryMap get librariesMap => _librariesMap;
 
   @override
   Object visitMapLiteralEntry(MapLiteralEntry node) {
     String libraryName = null;
     Expression key = node.key;
     if (key is SimpleStringLiteral) {
-      libraryName = "${_LIBRARY_PREFIX}${key.value}";
+      libraryName = "$_LIBRARY_PREFIX${key.value}";
     }
     Expression value = node.value;
     if (value is InstanceCreationExpression) {
       SdkLibraryImpl library = new SdkLibraryImpl(libraryName);
       List<Expression> arguments = value.argumentList.arguments;
       for (Expression argument in arguments) {
         if (argument is SimpleStringLiteral) {
           library.path = argument.value;
         } else if (argument is NamedExpression) {
           String name = argument.name.label.name;
@@ skipping 207 matching lines @@
     this._implementation = implementation;
   }
 
   /**
    * Record that this library can be run on the VM.
    */
   void setVmLibrary() {
     _platforms |= VM_PLATFORM;
   }
 }