formatting of alternative ArcTanh improved. Refs: #189. as suggested by Robert.
formatting of alternative ArcTanh improved. Refs: #189.
as suggested by Robert.

Signed-off-by: Josef Templ <728e923cfc3fe8323845faf68caa3d182912642a@gmail.com>

BlackBoxCenter/blackbox,BlackBoxCenter/blackbox,BlackBoxCenter/blackbox,BlackBoxCenter/blackbox