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Improved and shortened prime_check.py (#3454)

* Made small improvements and shortened prime_check.py

* improved descriptions on tests in prime_check.py

* Ran black and isort
R
Rolv Apneseth committed
04fae4db9b7bccc219e1548e8b3bfcd135b38f64
Parent: c2b7acd
Committed by GitHub <noreply@github.com> on 10/23/2020, 4:17:29 PM