Tests

fix misplaced losing paren causing bug on transient dissoc/disj of co… #485

Job	Run time
testing-on-dart-stable (ubuntu-latest)	1m 31s
testing-on-dart2 (ubuntu-latest)	1m 33s
testing-on-dart-stable (macOS-latest)	2m 38s
testing-on-dart2 (macOS-latest)	2m 24s
	8m 6s

Provide feedback