Random state 15 puzzle scrambles contain cancelling moves

[benwh1]

e.g.

D2 R U L D R U2 L D R D L U R2 U R D L2 U R2 D L3 U R D2 R U2 D2 R D L3 U R3 U L D L U R2 U L2 D3 L U D R3

Things like R R can also appear in scrambles. This probably comes from the solutions of the three phases being concatenated

[cs0x7f]

It has been fixed in /new/