Remove the comma after the signal

Error²Federal courts, Illinois courts21st and 22nd editions

A signal runs straight into the citation it introduces; “e.g.” is the one signal that takes a comma after it.¹

1. 1R. 1.2 Introductory Signals; B1.2 Introductory Signals.
2. 2An error: the rule in note 1 allows one form, and this is not it.