I was reading through the Formatting Sandobox here.
In the comments section of this answer, there are some comments that contain some text to the right of the username.
Hello, I am Jon Skeet. teekS noJ - – Manishearth Mar 30 at 11:18
As a reply to a comment that asks how do they do that a user writes:
Yay, I figured it out!! Copy the character inside the codeblock to get it it's a mirroring character. Note that the codeblock may have placed itself after my username. " " – Manishearth Mar 27 at 12:43
But I don't understand.
Can someone clarify?