Tests

Fix rubygems source code location metadata. #29

Job	Run time
test (1.6.0, false, 2.7, false)	56s
test (1.6.0, false, 3.0, false)	51s
test (1.6.0, false, 3.1, false)	54s
test (1.6.0, false, 3.2, false)	50s
test (1.6.0, false, ruby-head, true)	1m 8s
test (1.6.0, false, jruby-9.4.2, false)	2m 0s
test (1.6.0, false, jruby-head, true)	1m 31s
test (HEAD, true, 2.7, false)	21s
test (HEAD, true, 3.0, false)	1m 24s
test (HEAD, true, 3.1, false)	51s
test (HEAD, true, 3.2, false)	1m 13s
test (HEAD, true, ruby-head, true)	1m 3s
test (HEAD, true, jruby-9.4.2, false)	1m 43s
test (HEAD, true, jruby-head, true)	2m 10s
	16m 55s

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