Correct mistake in mooneyrivlindensity

Correct mistake so the formula is the one from the paper here: https://www.sciencedirect.com/science/article/abs/pii/S0924424715002022

@oliver.sander_at_tu-dresden.de or @patrick.jaap_at_tu-dresden.de: can you have a look?

Looks good. Is now also consistent with Wikipedia :)

Can you please put this into two commits? The parameter set change is basically unrelated to the change in the density.

And can you also change the corresponding test?

I agree with what Patrick says.

added 2 commits

• f7cd0f9f - Correct mistake in mooneyrivlindensity
• 45f738ff - Correct parset file to calculate the deformation for film-on-substrate

Compare with previous version

merged

mentioned in commit 942fc339