handle comments and sig with StudipTransformFormat fixes #3280

git-svn-id: svn://develop.studip.de/studip/trunk@25756 c5b85792-5220-0410-ad23-ed5b6b8ad999
fixes #3281

git-svn-id: svn://develop.studip.de/studip/trunk@25757 c5b85792-5220-0410-ad23-ed5b6b8ad999