Since questions and answers are sometimes editted in response to dialogue in chat, does it make sense to add a visual indicator in the chat transcript that an edit occured? 

Looking back at an older exchange, this UI element might provide clarity on context of the chat transcript and evolution of the Q/A exchange that would otherwise be lost.

If this is something that is desirable, perhaps a few elements to this feature might also be considered

* hotlink to the edit/diff from the transcript event
* replying to the event directly (as one would reply to a chat message)
* "commit messages" for each edit to help the chat event provide summary context
* others?