modula operation

[trufanov-nok]

It seems to affect nothing but perhaps it will be better to replace this line

python-sgp4/sgp4/propagation.py

Line 1802 in fac882a

mm = (xlm - argpm - nodem) % twopi

with

     temp_mm = xlm - argpm - nodem
     mm     = temp_mm % twopi if temp_mm >= 0.0 else -(-temp_mm % twopi)

like it's done for nodem few lines above. Because (xlm - argpm - nodem) could be negative.
Test TLE:

line1 = '1 41465U 16026B   16119.28938119 -.00000073  00000-0  00000+0 0  9994'
line2 = '2 41465  97.2725  25.4306 0011130 259.3700 198.8486 15.29059623    13'