Since each edit changes the meaning of the sentence significantly, it should be credited with the name of the editor and the time and data of the edit. However, each such credit vastly exceeds the space of the edit itself.
I think you are solving a hypothetical problem. Something that arcane would probably need more than the single letter to note the meaning of the change.
But, if you think this is a barrier keeping the wiki back, what is your solution?
Is there some other wiki software that solves this issue? Or forum software?