Assert_equal for arrays of strings in the fortran track test library

[D3usXMachina]

The output of the proteins function in the protein-translation exercise for W5 in 48in24 should be a list/array of strings.

I’d therefore like to add an assert_equal function for arrays of strings to the testlib in preparation for adding the protein-translation exercise.

[iHiD]

That conceptually sounds sensible to me!

@ErikSchierboom can weigh in on Tuesday if no-one else does first