[Feature Request] Documentation for n_evaluations flag should be improved

[jkterry1]

Right now, all that's said is:

parser.add_argument("--n-evaluations", help="Number of evaluations for hyperparameter optimization", type=int, default=20)

The problem is that this doesn't tell you what exact number is being referred to without diving into the code--it could plausibly be the number of times a hyperparameter set is evaluated and tested, the number of evaluation points during a training curve, or a few other things.

[araffin]

Hello,
I do agree on that point and would welcome a PR that clarifies its role ;)