The reason behind this meta question stems from this question.
The question as asked by the OP was rather poor by my standards. It was localized and subjective. I voted to close, downvoted, and left commentary.
Subsequently, Knives edited the question significantly. His edit even put words into the OP's mouth. The OP didn't request any assistance with editing.
I saw this, and reverted the entire change because I feel that such a significant edit should be done by the OP, or by another if the OP requested help. I also feel that the putting of words into someone's mouth was completely unnecessary.
Am I out of line here? What guidelines should we have for significant editing of others posts?
I tend to limit myself to grammatical and spelling errors. Occasionally, I'll restructure a sentence or paragraph to remove ambiguity and even less frequently cut out something entirely superfluous.
Here's another example, coincidentally edited by the same person. Here the question is non-trivially altered to make it more appropriate for the site. This I don't have any objections to, but it's not an edit I would make myself on another's question. What are your thoughts for this example?