Documentation errors for FFTW module in genstdlib.jl

[jakebolewski]

As a follow up to #13274 now that #13281 is merged, the FFTW methods are not being documented correctly to be picked up by genstdlib.jl.

cc @nkottary

[tkelman]

how do we fix it? I think I also saw a warning about a signature change in eigs

[MichaelHatherly]

I was able to fix the major errors/warnings with this diff, https://gist.github.com/MichaelHatherly/b45a571854387a9700e9, but managed to introduce some weird character changes in the process... anyone seen those before?

The eigs signature had ended up out of sync, and I needed to add the DFT and FFTW modules to genstdlib.jl manually (see the add_all_docs_mod(...) calls) to get it to recognise the docstrings that got moved inline recently into those modules. Would be good to have that done automatically though.

Also, combining the ifftshift docstrings into a single one since before both the second docstring was just redocumenting the same Function rather than a particular Method.

[tkelman]

Is this fixed?

[MichaelHatherly]

With the rewrite of genstdlib.jl #15266 I've not noticed any problems with the FFTW module, so I'll close this for now.