Enhance prettyprint for TypeAnnotation

lib/compiler/implementation/tree/prettyprint.dart

 // Copyright (c) 2012, 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.
 
 /**
  * Pretty-prints Node tree in XML-like format.
  *
  * TODO(smok): Add main() to run from command-line to print out tree for given
  * .dart file.
  */
@@ skipping 327 matching lines @@
 
   visitThrow(Throw node) {
     visitNodeWithChildren(node, "Throw");
   }
 
   visitTryStatement(TryStatement node) {
     visitNodeWithChildren(node, "TryStatement");
   }
 
   visitTypeAnnotation(TypeAnnotation node) {
-    visitNodeWithChildren(node, "TypeAnnotation");
+    openNode("TypeAnnotation", {
+      "beginToken" : tokenToStringOrNull(node.getBeginToken()),
+      "endToken" : tokenToStringOrNull(node.getEndToken())
+    });
+    visitWithPrefix(node.typeName, "typeName:");
+    visitWithPrefix(node.typeArguments, "typeArguments:");
+    closeNode("TypeAnnotation");
   }
 
   visitTypedef(Typedef node) {
     visitNodeWithChildren(node, "Typedef");
   }
 
   visitTypeVariable(TypeVariable node) {
     visitNodeWithChildren(node, "TypeVariable");
   }
 
   visitVariableDefinitions(VariableDefinitions node) {
     openNode("VariableDefinitions", {
       "beginToken" : "${node.getBeginToken().stringValue}",
       "endToken" : "${node.getEndToken().stringValue}"
     });
     visitWithPrefix(node.type, "type:");
     visitWithPrefix(node.modifiers, "modifiers:");
     visitWithPrefix(node.definitions, "definitions:");
     closeNode("VariableDefinitions");
   }
 
   visitWhile(While node) {
     visitNodeWithChildren(node, "While");
   }
 }