Editing 

Edits on wiki improve by evolution: only the best survives. They become best by change after change after change. I find I make two kinds of edits. Ones which add content, and ones which improve language. I fancy I am quite good at writing smooth prose, but very often it is not possible to do this immediately. If I have a fact to insert or point to make, the primary thing is to make or insert it. Then someone else can smooth it along, or i may do so myself when I have more time, or after leaving the piece and re-reading it. It can be quite difficult to write good prose in one go, because you do not spot your mistakes. As to our last exchange in Severus Snape, yes I agree, I put in a clumsy statement, but I was trying to express a particular point. You improved the flow, but slightly altered my point. I changed it again, back a little to my original intention, though you also added something. Cheers.