Editing Up to Eleven (section)
Use spoiler tags when you really need them, but it would be even better if you could manage to write your example without bringing up the sensitive information at all.
Warning: The database has been locked for maintenance, so you will not be able to save your edits right now. You may wish to copy and paste your text into a text file and save it for later.
The system administrator who locked it offered this explanation: Upgrading to MediaWiki 1.31