Reduce yet more randomness in FTheoryTools

[HereAround]

• Check doc strings - is rng documented (in a uniform way) for all relevant functions?
• Should the signature of g4_flux_family(gf::G4Flux; completeness_check::Bool = true) be changed? I suppose it should allow to switch the algorithm used to create the g4 flux family by? If so, likely (?) also needs an rng kwarg.
• Other instances similar to the above?

cc @emikelsons @apturner

[emikelsons]

Looks good and the tests pass!

[emikelsons]

I didn't notice the comment at first, but it makes sense that g4_flux_family should have an optional argument to specify the algorithm

[HereAround]

I didn't notice the comment at first, but it makes sense that g4_flux_family should have an optional argument to specify the algorithm

Alright. I will come back to those issues/open ends in the next PR.

[fingolfin]

I've now changed this to use the release notes: use title label