fdo#39468 Make forms/ German comments clean

Change-Id: Iec24928324bec1caee65ca37cbf0fb5b66e6975e
Reviewed-on: https://gerrit.libreoffice.org/11760
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>