"But how long is it going to take you to figure out that tab-completion is called hippie-expand in Emacs?" I figured he must be joking, so I alt-tabed over to

"But how long is it going to take you to figure out that tab-completion is called hippie-expand in Emacs?" I figured he must be joking, so I alt-tabed over to my Emacs session. To my surprise, there is actually a command called hippie-expand in Emacs!