Awesome hidden feature in Skype for Mac

The other day I was text chatting to a friend of mine on Skype. As you inevitably do when chatting I accidentally sent a typo (let's say I typed awrsome instead of awesome).

Since I mostly chat with geeks who know what a sed search and replace command looks like, I have developed the convention over the years of doing the following when I accidentally type something I shouldn't have:

s/awrsome/awesome/

To my surprise, when I did that in the Skype chat it actually did replace awrsome with awesome in the previous message! Sadly it doesn't look like it supports regular expressions or full sed commands, but still nice!