Cheers for the heads-up on the typo. The diagram's an SVG, with the labels being in plain ASCII. One keystroke is all it took indeed! :P On the serious side, A

Cheers for the heads-up on the typo. The diagram's an SVG, with the labels being in plain ASCII. One keystroke is all it took indeed! :P On the serious side, ASCII art diagrams are splendid and I very often use them myself, though they can get quite complex and thus messy to maintain. There comes a certain point where they lose their simplicity, sadly.