Comment: Jesus does not forgive the woman. He said "Neither do I condemn you." which is a different way of extending mercy. It is hard to read that as commanding her to change her behavior. The rigor you see depends entirely on "sin no more" which might be taken in a number of ways.
In any event, I dont think anyone would say "I don't condemn you" is "rigorist." It sounds pretty lax to me.