[BUGFIX] #48194: Permanent links are hidden

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/restdoc/trunk@75347 735d13b6-9817-0410-8766-e36946ffe9aa
[TASK] Add some unit tests

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/restdoc/trunk@75350 735d13b6-9817-0410-8766-e36946ffe9aa