Change comparison operators and change how mate score is printed

[dallinson]

STC:

Elo   | 3.53 +- 4.64 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 2.91 (-2.25, 2.89) [-5.00, 0.00]
Games | N: 8764 W: 2506 L: 2417 D: 3841
Penta | [196, 952, 1999, 1037, 198]

LTC:

Elo   | 2.50 +- 3.78 (95%)
SPRT  | 40.0+0.40s Threads=1 Hash=64MB
LLR   | 2.90 (-2.25, 2.89) [-5.00, 0.00]
Games | N: 10012 W: 2657 L: 2585 D: 4770
Penta | [120, 1035, 2615, 1125, 111]

Bench: 7856548