Ruby

refactor auto_detection and file_io into separate files #345

Job	Run time
test_matrix (ubuntu, 2.5)	24s
test_matrix (ubuntu, 2.6)	25s
test_matrix (ubuntu, 2.7)	25s
test_matrix (ubuntu, 3.0)	12s
test_matrix (ubuntu, 3.1)	9s
test_matrix (ubuntu, 3.2)	9s
test_matrix (ubuntu, head)	10s
test_matrix (ubuntu, truffleruby)	35s
test_matrix (ubuntu, truffleruby-head)	41s
test_matrix (ubuntu, jruby)	41s
test_matrix (ubuntu, jruby-head)	42s
test_matrix (macos, 2.5)	56s
test_matrix (macos, 2.6)	50s
test_matrix (macos, 2.7)	51s
test_matrix (macos, 3.0)	23s
test_matrix (macos, 3.1)	18s
test_matrix (macos, 3.2)	22s
test_matrix (macos, head)	29s
test_matrix (macos, truffleruby)	1m 48s
test_matrix (macos, truffleruby-head)	1m 0s
test_matrix (macos, jruby)	57s
test_matrix (macos, jruby-head)	1m 48s
finish	0s
	14m 15s

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