see news message https://groups.google.com/forum/#!topic/amber-lang/0YZqVmUMYkM
Didn't 4dfbe9fa97 already add Number >> min:max:, though?
Yes, now I see that Number >> min:max: is there where it should be. I don't know how I dreamed that it was missing, sorry. I am going to close this issue right now.
Well, it was only added in the latest release. Maybe you still had 0.19.0 or older if you tried.