[MSKINS-86] class prettyprint not added to pre tags

git-svn-id: https://svn.apache.org/repos/asf/maven/skins/branches/maven-fluido-skin-1.3.x@1647907 13f79535-47bb-0310-9956-ffa450edef68
[MSKINS-86] class prettyprint not added to pre tags

Previous regex did not work

git-svn-id: https://svn.apache.org/repos/asf/maven/skins/branches/maven-fluido-skin-1.3.x@1647915 13f79535-47bb-0310-9956-ffa450edef68