Fix Javadoc syntax
Javadoc does not seem to allow generic types, so use html entities to simulate the result
Neat hack from http://stackoverflow.com/questions/9482309/javadoc-bug-link-cant-handle-generics#comment-22244407

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1476780 13f79535-47bb-0310-9956-ffa450edef68