In Emacs I have automatically closing brackets and quotes and such, and if I want to encapsulate something I select the entire thing I want to encapsulate, press the opening character, and it automatically puts the closing character at the end of the selection. It also properly moves over closing elements when I hit a closing character (so if the cursor is in front of a closing bracket and I press the closing bracket key the cursor moves behind the closing bracket instead of inserting another one). I've gotten so used to it that editors which don't do this correctly turn me off big time.