very minor fix [fixes #215]
very minor fix [fixes #215]

khalibartan/pgmpy,ankurankan/pgmpy,vivek425ster/pgmpy,ankurankan/pgmpy,pratyakshs/pgmpy,kislayabhi/pgmpy,abinashpanda/pgmpy,khalibartan/pgmpy,kris-singh/pgmpy,sandeepkrjha/pgmpy,abinashpanda/pgmpy,kris-singh/pgmpy,pgmpy/pgmpy,anaviltripathi/pgmpy,anaviltripathi/pgmpy,liquidmetal/pgmpy,sandeepkrjha/pgmpy,yashu-seth/pgmpy,vivek425ster/pgmpy,palashahuja/pgmpy,jhonatanoliveira/pgmpy,pratyakshs/pgmpy,liquidmetal/pgmpy,palashahuja/pgmpy,yashu-seth/pgmpy,kislayabhi/pgmpy,pgmpy/pgmpy,jhonatanoliveira/pgmpy