Merge pull request #1597 from rspec/fix-ruby-head #888

Job	Run time
Ruby 2.7 (Windows)	4m 33s
Ruby 2.6 (Windows)	3m 47s
Legacy Ruby Builds (2.1.9)	1m 18s
Rubocop	29s
Ruby 2.5 (Windows)	3m 54s
Legacy Ruby Builds (2.0)	1m 18s
Ruby 3.3	2m 57s
Legacy Ruby Builds (1.9.3)	1m 12s
Ruby 2.4 (Windows)	3m 3s
Ruby 3.2	2m 41s
Ruby 2.3 (Windows)	2m 9s
Legacy Ruby Builds (1.9.2)	1m 56s
Ruby 3.1	2m 45s
Ruby 2.2 (Windows)	2m 11s
Ruby 3.0	2m 48s
Legacy Ruby Builds (1.8.7)	1m 19s
Legacy Ruby Builds (REE)	1m 28s
Ruby 2.7	2m 55s
Legacy Ruby Builds (JRuby 1.7)	3m 39s
Ruby 2.6	2m 42s
Legacy Ruby Builds (JRuby 1.7 1.8 mode)	3m 11s
Ruby 2.5	2m 35s
Legacy Ruby Builds (JRuby 9.1.17.0)	4m 16s
Ruby 2.4	2m 24s
Ruby 2.3	2m 27s
Ruby 2.2	3m 8s
Ruby ruby-head	1m 3s
Ruby jruby-9.2.13.0	6m 22s
Ruby 2.7 with diff-lcs 1.3	3m 2s
Ruby 2.7 with diff-lcs 1.4.3	3m 9s
	1h 20m 41s

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