Update strain/strain_test.clj
Update strain/strain_test.clj

Remove `(run-tests)` per recent testing overhaul and reverse my bad
advice re: `constantly`. Thanks, @cayennes!

See PR #73

canweriotnow/xclojure,exercism/xclojure,querenker/xclojure,exercism/xclojure,yurrriq/xclojure,querenker/xclojure