Update the --seed description
Created by: dkniffin
In addition to making the test examples order deterministic, --seed also seeds the Random class, making various random generators deterministic.
I tried to find where exactly this change is applies so I could make the description as accurate as possible. I think it happens here, but I'm not 100% sure. In any case though, I think the CLI options should indicate that it makes more things deterministic than just the examples ordering.