saturation. In particular, it deals with the capitalized "S"-function in
the material laws:
Sgr -> sgr
Snr -> snr
SnToSne -> snToSne
Sreg -> sreg
Sw -> sw
SwToSwe -> swToSwe
SweToSw_ -> sweToSw_
Swr -> swr
Swrx -> swrx

Reviewed by Christoph. 



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