Update Checkstyle, so the Ivy-Check build job could run.
https://builds.apache.org/view/A-D/view/Ant/job/Ivy-check

git-svn-id: https://svn.apache.org/repos/asf/ant/ivy/core/trunk@1592699 13f79535-47bb-0310-9956-ffa450edef68
typo in comment

git-svn-id: https://svn.apache.org/repos/asf/ant/ivy/core/trunk@1592701 13f79535-47bb-0310-9956-ffa450edef68