Switch unicode chars for output display. #193

Job	Run time
1/4	16m 34s
2/4	13m 17s
3/4	13m 5s
4/4	24m 10s
py-3-latest	21m 51s
flaky	7m 8s
_remote_background_indep_poll	5m 39s
_remote_background_indep_tcp	7m 17s
macos 1/5	35m 25s
macos 2/5	31m 30s
codecov	0s
	2h 55m 56s

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