Modify matrix_ops tests to accomodate fixed values
Modify matrix_ops tests to accomodate fixed values

Intialisation and printing of certain variables implictly used
the elem type, which is fine until you go to fixed values
which need converting before printing

This is the user's responsibility, so we modify the tests to
reflect this

cphang99/matrix_playground,cphang99/matrix_playground,cphang99/matrix_playground