Documentation for crossvalidation not updated

[ngiann]

Sometime ago, I modified Kfold, StratifiedKfold and RandomSub in order to control their dependence on the random number generator, by making their first argument an RNG with the default value of Random.GLOBAL_RNG (see #57).

I tried to update the documentation accordingly of cross validation, but I see that the changes are not visible. One can see the changes, however, if we click on "edit on github" while at this page. E.g. if you click on "edit on github", you will see that the new definition of Kfold should read Kfold([rng=GLOBAL_RNG], n, k) which is not visible on the actual web page.

Could somebody perhaps help me resolve this?