fix naked percent sign in matlab shell setup
fixed naked percent symbol in matlab shell setup.
see JISC list threads for reported errors:
https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind1902&L=FSL&D=0&P=194733 https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind1903&L=FSL&O=D&P=86303