Comments about viscosity term to be fixed in SPHENIX
These comments look suspicious:
https://gitlab.cosma.dur.ac.uk/swift/swiftsim/-/blob/master/src/hydro/SPHENIX/hydro_iact.h#L441
https://gitlab.cosma.dur.ac.uk/swift/swiftsim/-/blob/master/src/hydro/SPHENIX/hydro_iact.h#L577
Does this still need fixing? Or should the comments be changed?