Contour: need to detail the norms

[adutfoy]

What is the idea?

The documentation of the method Contour.GetValidNorms() details only the name of different norms available: 'asinh,linear,log,logit,symlog,rank'

• the example in the API only print the two first ones:
  print(ot.Drawable.GetValidNorms()[:2])
  I think it should be more useful to print all the norms so that the User has the whole list at once:
  print(ot.Drawable.GetValidNorms())

• the documentation should describe each norm or at least give some references so that the User understands the differences (without testing each of them because sometimes the graph is expensive to produce!)

Why is this needed?

No response

Additional Context

No response