The VolumetricSourceTerm is equal to the
LineSourceTerm. Consequently, it is possible to
use VolumetricSourceTerm and remove LineSourceTerm.

Fixes multiple copyright messages in the doxygen docu.

ag '\\file' -L --ignore=ThirdParty *Lib |xargs  sed -i 's/\(.*\)\\copyright/\1\\file\n\1\\copyright/'

Use the specified patch mesh instead of the entire bulk mesh to define
the source term.

First approach use the original bulk mesh as integration domain.

Clang format run on near-the-header lines.

Happy New Year