The behavior of fft() differs from MATLAB

This one caught me out. If `A` is a matrix in MATLAB, then `fft(A)` is a 1D FFT acting column-wise. MATLAB has a `fft2()` command for 2D FFTs.
Adding backtick-backtick
Merge pull request #8158 from ajt60gaibb/patch-1

The syntax of fft() differs from MATLAB