updated epilog docstring per @mr-c
updated epilog docstring per @mr-c

kdmurray91/khmer,souravsingh/khmer,souravsingh/khmer,kdmurray91/khmer,Winterflower/khmer,jas14/khmer,souravsingh/khmer,ged-lab/khmer,jas14/khmer,kdmurray91/khmer,Winterflower/khmer,ged-lab/khmer,F1000Research/khmer,jas14/khmer,F1000Research/khmer,F1000Research/khmer,ged-lab/khmer,Winterflower/khmer