When viewing a post that has been edited the date of creation is replaced by the date of the last edit.
I suggest to display the creation date as well - the line seems to provide sufficient space.
Use cases :
- On AskUbuntu we determine if a question about an old release is off topic by looking at the date when it was asked. (only new questions about old releases are OT)
- As it is currently not possible to see the revision history of a post this would provide a way to get a time context for the post.