Updated usage line for stringify.
Updated usage line for stringify.

takahito-tejima/OpenSubdiv,takahito-tejima/OpenSubdiv,xldeveloper/OpenSubdiv,nyotis/OpenSubdiv,nyotis/OpenSubdiv,takahito-tejima/OpenSubdiv,poljere/OpenSubdiv,poljere/OpenSubdiv,poljere/OpenSubdiv,lookup1980/OpenSubdiv,c64kernal/OpenSubdiv,shengfuintel/OpenSubdiv,anshuarya/OpenSubdiv,lookup1980/OpenSubdiv,xldeveloper/OpenSubdiv,c64kernal/OpenSubdiv,shengfuintel/OpenSubdiv,xldeveloper/OpenSubdiv,c64kernal/OpenSubdiv,nyotis/OpenSubdiv,shengfuintel/OpenSubdiv,anshuarya/OpenSubdiv,lookup1980/OpenSubdiv,anshuarya/OpenSubdiv