combined allowable characters into single string, as expected

4 jobs for 158-visually-similar-characters in 3 minutes and 44 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed Go-py3.4 #4939

00:01:28

passed Go-py3.5 #4940

00:02:21

passed Go-py3.6 #4941

00:01:33

72.0%
 
  Lint
passed Go-flake8 #4942

00:01:22