Test

Ruby head changes formatting of hash. #98

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Run time

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Job	Run time
2.5 on ubuntu	18s
2.6 on ubuntu	24s
2.7 on ubuntu	20s
3.0 on ubuntu	11s
3.1 on ubuntu	6s
3.2 on ubuntu	9s
2.6 on macos	28s
2.7 on macos	25s
3.0 on macos	14s
3.1 on macos	10s
3.2 on macos	13s
truffleruby on ubuntu	21s
jruby on ubuntu	31s
head on ubuntu	7s
	3m 57s