I found a comment to a post on one of the Stack Exchange sites at:
I see some special formatting that they used in the comment:
Yes, I know I can find out the special notation via the Help button that is provided when you post a comment. But new users won't know about that help button that only shows up when you post a comment. Instead, I desire to view (but not edit) the unrendered comment text syntax, so as to see their specific notation.
Is there a way to do that? If not, then: This is an enhancement request for a tiny "View" button or icon right next to that comment that, when pressed, would popup that particular comment's text in a tiny form that I can use the mouse to select the raw markup text and copy it out for reuse. It might be best to provide an Edit button even if the current user does not have editing privileges, but only prevent them from posting the edit, but still allow them to select and copy the text out of the editing form.
Other helpful answers that were not exactly what I was looking for: