Ruby

refactor auto_detection and file_io into separate files #341

Job	Run time
test_matrix (ubuntu, 2.5)	19s
test_matrix (ubuntu, 2.6)	21s
test_matrix (ubuntu, 2.7)	32s
test_matrix (ubuntu, 3.0)	14s
test_matrix (ubuntu, 3.1)	12s
test_matrix (ubuntu, 3.2)	8s
test_matrix (ubuntu, head)	14s
test_matrix (ubuntu, truffleruby)	46s
test_matrix (ubuntu, truffleruby-head)	48s
test_matrix (ubuntu, jruby)	40s
test_matrix (ubuntu, jruby-head)	43s
test_matrix (macos, 2.5)	1m 18s
test_matrix (macos, 2.6)	1m 28s
test_matrix (macos, 2.7)	46s
test_matrix (macos, 3.0)	16s
test_matrix (macos, 3.1)	18s
test_matrix (macos, 3.2)	28s
test_matrix (macos, head)	29s
test_matrix (macos, truffleruby)	2m 7s
test_matrix (macos, truffleruby-head)	1m 37s
test_matrix (macos, jruby)	1m 2s
test_matrix (macos, jruby-head)	1m 37s
finish	0s
	16m 23s

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