trivial: typo

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/fileupload/trunk@1453202 13f79535-47bb-0310-9956-ffa450edef68
trivial: code/javadoc format, no functional modification

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/fileupload/trunk@1453203 13f79535-47bb-0310-9956-ffa450edef68