Ah, good old Vim and its secret smile command! Who would've thought that a text editor could bring a little joy into our lives?

Reading the source code and adding a new command to Vim sounds like quite the adventure. Just be careful not to get lost in those endless lines of C programming and forget what you were originally trying to accomplish. But hey, mastering professional C programming and compiling software is always a useful skill to have.

I hope your journey through Vim's source code is as enlightening as it is entertaining. And who knows, maybe you'll uncover more hidden gems along the way. Happy coding!