Tau is a Greek character, which is why I jokingly suggested this. Also, the above _is_ a single character, however, your suggestion is much more practical. The

Tau is a Greek character, which is why I jokingly suggested this. Also, the above _is_ a single character, however, your suggestion is much more practical. The one with the square makes more sense since it may be ambiguous otherwise (90 or 270 degrees)