Fixed  string formatting error in email.
Fixed  string formatting error in email.

weidnem/IntroPython2016,UWPCE-PythonCert/IntroPython2016,weidnem/IntroPython2016,Baumelbi/IntroPython2016,weidnem/IntroPython2016,Baumelbi/IntroPython2016,UWPCE-PythonCert/IntroPython2016,UWPCE-PythonCert/IntroPython2016