I forgot to mention another feature related to editing. For example, in Quora there is the possibility of "suggest editing". That is, if you open a thread or write a message, if you have spelling mistakes or some correctable error that you possibly skipped. Another user can click the "suggest editing" option, edit it the same, and send it as a suggestion to the author of the message.
Must be notified, when clicking, will leave the suggested editions. If you wrote:
"US is the greatest military powr in the worl"
He has a spelling mistake, which could have been overlooked. And a user in good faith, takes the trouble to suggest an issue and does the same, and sends it as a suggestion to you ... it remains this way:
"US is the greatest military power in the world"