Naming of CollisionCoeffData::setPairCollisionMarginData()

[rjoomen]

I seems to me that CollisionCoeffData::setPairCollisionMarginData() should be called CollisionCoeffData::setPairCollisionCoeff(), as it sets the coefficient instead of the margin (the getter is correctly called getPairCollisionCoeff()).

Should I submit a PR?

[Levi-Armstrong]

You are correct. Sure please do.

[rjoomen]

Same file: is this line still correct?

[Levi-Armstrong]

I would say that line can be removed

[rjoomen]

I removed it at a few more places, please review.