[py/BF] minor bugfix in legend for plotMultiplePMFs
[py/BF] minor bugfix in legend for plotMultiplePMFs

esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x