Since I don't have 20k rep, I can only suggest edits for tag wikis. On several occasions, after submitting the suggested edit I discovered I made a minor error.
Had my suggestion been rejected, I would gladly submit a fixed suggested edit. However, my edit was approved and I got the +2 rep. Is it OK for me to submit a fix to my edit (which would be very minor)? Somehow it doesn't feel right that I would get more rep (assuming the next edit would be approved) due to my original mistake. My other options are either to wait till I get to 20k rep (at my current rate that might happen around the end of 2014) or to ask a 20k user to fix my error.
Is it possible for me to rollback the edit? If it's not possible once it is approved, can I rollback a suggested edit that hasn't been approved yet? Can I modify a suggested edit that hasn't been approved yet?