Correctly handle random parameters appearing in the denominator

[heplesser]

This PR fixes #3156 and ensures that expressions containing random parameters in the denominator are evaluated correctly. It also fixes a minor error in the SLI interface.

Developed in collaboration with Jannik Grundler.

[ackurth]

Looks good to me.
You mention in the message that you developed the PR in collaboration with Jannik Grundler.
Maybe do a co-authored commit (if he has a GitHub account) to give him also some credit in the commit history.

[heplesser]

Looks good to me. You mention in the message that you developed the PR in collaboration with Jannik Grundler. Maybe do a co-authored commit (if he has a GitHub account) to give him also some credit in the commit history.

Good point @ackurth, you can already find it here: https://github.com/nest/nest-simulator/pull/3158/commits

[ackurth]

Looks good to me. You mention in the message that you developed the PR in collaboration with Jannik Grundler. Maybe do a co-authored commit (if he has a GitHub account) to give him also some credit in the commit history.

Good point @ackurth, you can already find it here: https://github.com/nest/nest-simulator/pull/3158/commits

Ah, I did not see this.
But there is no GitHub account linked to this mail address.
Jannik's account name is Jannik-Grundler, the mail address is jannik.grundler@rwth-aachen.de.

[heplesser]

Looks good to me. You mention in the message that you developed the PR in collaboration with Jannik Grundler. Maybe do a co-authored commit (if he has a GitHub account) to give him also some credit in the commit history.

Good point @ackurth, you can already find it here: https://github.com/nest/nest-simulator/pull/3158/commits

Ah, I did not see this. But there is no GitHub account linked to this mail address. Jannik's account name is Jannik-Grundler, the mail address is jannik.grundler@rwth-aachen.de.

Fixed.

[mlober]

Thanks. Now this looks good to me.