Test of U turn direction in mixed couple/miniwave formations.

sdr> /program = Program.PLUS; setFormation(Formation.SQUARED_SET)
|      3Gv  3Bv
| 
| 4B>            2G<
| 
| 4G>            2B<
| 
|      1B^  1G^
sdr> heads lead right ; extend ; extend
|      4B>
| 
| 3G<  2G<  1B>
| 
| 3B<  4G>  1G>
| 
|      2B<
sdr> do half of a u turn back
|      4Bv
| 
| 3Gv  2G^  1Bv
| 
| 3B^  4Gv  1G^
| 
|      2B^
sdr> roll
|      4B<
| 
| 3G>  2G>  1B<
| 
| 3B>  4G<  1G<
| 
|      2B>
sdr> u turn back and roll
|      4B^
| 
| 3G^  2Gv  1B^
| 
| 3Bv  4G^  1Gv
| 
|      2Bv