Adjust javadocs

Author: acoburn

acp/src/main/java/com/inrupt/client/acp/AccessControlResource.java

@@ -222,8 +222,8 @@ public Policy merge(final Set<URI> allow, final Policy... policies) {
      * Find a policy, given a type, value and set of modes.
      *
      * @param type the matcher type
-     * @param value the matcher value, may be {@null}
-     * @param modes the expected modes of the enclosing policy, may be {@null}
+     * @param value the matcher value, may be {@code null}
+     * @param modes the expected modes of the enclosing policy, may be {@code null}
      * @return the matched policies
      */
     public Set<Policy> find(final MatcherType type, final URI value, final Set<URI> modes) {