Test reverse the pass.

sdr> /program=Program.C3B
C3B
sdr> heads lead right while the sides trade
| 4G<  3G<  1B>  2B>
| 
| 4B<  3B<  1G>  2G>
sdr> reverse the pass
| 3B>  4B>  2G<  1G<
| 
| 3G>  4G>  2B<  1B<
sdr> do half of a reverse the pass
| 3B>  2B>
| 
| 4G<  1G<
| 
| 3G>  2G>
| 
| 4B<  1B<
sdr> tag the line
| 3G^  2G^
| 
| 4B^  1B^
| 
| 3Bv  2Bv
| 
| 4Gv  1Gv
sdr> do 1/6 of reverse the pass
|   3G>
| 
|   2G<
| 
| 4B^  1B^
| 
| 3Bv  2Bv
| 
|   4G>
| 
|   1G<
sdr> /reset
sdr> /program=Program.C3B
C3B
sdr> heads lead right while the sides trade
| 4G<  3G<  1B>  2B>
| 
| 4B<  3B<  1G>  2G>
sdr> do 5/6 of reverse the pass
|           4B>  2G<
| 3B^  3Gv            1G^  1Bv
|           4G>  2B<
sdr> /exit