Random half open ranges

bug: The random builtin returns results in the half open range. The docs should be updated to reflect that.

expect: Given that the randome builtin returns results in the half open range, I would expect the docs to make that clearer by saying the results are [START, END).

related: none

code:

random 1 3

expect: output

1 (sometimes)
2 (sometimes)

should never be 3

kernel: 4.19.0-9-amd64

version: ion 1.0.0-alpha

interaction: none

context: none