Write help pages for new FLOOR and CEILING functions as indicated in https://wiki.documentfoundation.org/ReleaseNotes/5.0#New_spreadsheet_functions
Moving to NEW. Trivial: Not a matter of creating professional work. Trivial issue. High: New functions should have proper documentation
Fixed by commit 4c58b1b195d7df86ea6ccee322478064f7f8a10a