Units Conversion Library

1) Using units.tcl , the sign value is lost in the
denominator during conversion:

examples:
% units::convert "1 degree / -2 s" degree/s
0.5
% units::convert "/ -2 s" Hz
0.5

2) Extra white space on the first argument of the entry
causes the sign value to be lost.

example (Note the extra space in from of the -1):
units::convert " -1 degree / 2 s" degree/s
0.5