Comment clean-up

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/IsExpression.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/IsExpression.java
===================================================================
--- editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/IsExpression.java	(revision 9355)
+++ editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/IsExpression.java	(working copy)
@@ -16,7 +16,7 @@
 import com.google.dart.engine.scanner.Token;
 
 /**
- * Instances of the class <code>IsExpression</code> represent an is expression.
+ * Instances of the class {@code IsExpression} represent an is expression.
  * 
  * <pre>
  * isExpression ::=
@@ -35,7 +35,7 @@
   private Token isOperator;
 
   /**
-   * The not operator, or <code>null</code> if the sense of the test is not negated.
+   * The not operator, or {@code null} if the sense of the test is not negated.
    */
   private Token notOperator;
 
@@ -55,8 +55,7 @@
    * 
    * @param expression the expression used to compute the value whose type is being tested
    * @param isOperator the is operator
-   * @param notOperator the not operator, or <code>null</code> if the sense of the test is not
-   *          negated
+   * @param notOperator the not operator, or {@code null} if the sense of the test is not negated
    * @param type the name of the type being tested for
    */
   public IsExpression(Expression expression, Token isOperator, Token notOperator, TypeName type) {