Write test for Normalization in cheb2leg and leg2cheb

[jishnub]

This used to work on v0.14

julia> cheb2leg([0.0, 1.0], normcheb=true)
2-element Vector{Float64}:
 0.0
 0.7978845608028654

but errors on v0.15

julia> cheb2leg([0.0, 1.0], normcheb=true)
ERROR: MethodError: no method matching th_cheb2leg(::Vector{Float64}; normcheb::Bool)

Closest candidates are:
  th_cheb2leg(::Any, ::Any...) got unsupported keyword argument "normcheb"
   @ FastTransforms ~/Dropbox/JuliaPackages/FastTransforms.jl/src/toeplitzhankel.jl:282

Stacktrace:
 [1] cheb2leg(::Vector{Float64}; z::Base.Pairs{Symbol, Bool, Tuple{Symbol}, NamedTuple{(:normcheb,), Tuple{Bool}}})
   @ FastTransforms ~/Dropbox/JuliaPackages/FastTransforms.jl/src/FastTransforms.jl:129
 [2] top-level scope
   @ REPL[29]:1

It would be good to get this working again

[dlfivefifty]

Ah didn't know about that keyword. You can use FastTransforms.lib_cheb2leg to use the old version for now.

Note we the lib version's plan is expensive which is why we now default to th_cheb2leg, which has a better complexity plan, though applying the plan is slower so plan_cheb2leg currently defaults to the old version.

[dlfivefifty]

This has been fixed by reverting to lib_cheb2leg (though back to the restrictions of small dimension).

I'm leaving this open as the tests should have picked this up.

[dlfivefifty]

Actually I just did it based on your example.

[MikaelSlevinsky]

Yes, apologies, there should have been tests for the normalization keywords.