How to insert a new line above the current line in TextMate? A la capital O in vi? I couldn't find it in the TextMate book, nor searching around online. A few seconds of fiddling on the keyboard turned it up though: command-option-return

This makes sense, as command-return inserts a new line below the current line. Having now looked around some more this command-option-return key sequence is documented as "move to end of line and insert end-of-line symbol", e.g. a semicolon in C or Perl. Conveniently, in Ruby and presumably other languages with no end-of-line symbol it has been redefined to the "new line above current line behavior". It's disappointing that there isn't a universal shortcut.