The test suite does not check that the solution is a character string, but the problem definition requires that it should.
Added this check. (I messed it up a bit the first time I tried to do it, so sorry for some interim weirdness.)
str = num2str(A,formatSpec), could replace '
Invalid solution, really
New test suite invalidates this solution.
Replace Vector Elements
Permute diagonal and antidiagonal
Is My Wife Wrong?
Matlab Basics - Rounding I
Maintain shape of logical-index mask
Are you in or are you out?
Sum My Indices
The Hitchhiker's Guide to MATLAB
Right and wrong
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