Resolve warning: duplicate character class in regex #493

Job	Run time
analyze	38s
collect-release-info	9s
collect-docsite-release-info	3s
unpublish_docsite	0s
test (3.0, rails_6_1, rspec_lt_3_10)	2m 5s
build-docsite	32s
test (3.0, rails_6_1, rspec_gte_3_10)	2m 10s
test (3.0, rails_7_0, rspec_lt_3_10)	2m 1s
test (3.0, rails_7_0, rspec_gte_3_10)	2m 10s
test (3.0, no_rails, rspec_lt_3_10)	1m 36s
test (3.0, no_rails, rspec_gte_3_10)	1m 36s
test (3.1, rails_6_1, rspec_lt_3_10)	2m 20s
test (3.1, rails_6_1, rspec_gte_3_10)	2m 25s
test (3.1, rails_7_0, rspec_lt_3_10)	2m 17s
test (3.1, rails_7_0, rspec_gte_3_10)	2m 20s
test (3.1, no_rails, rspec_lt_3_10)	1m 46s
test (3.1, no_rails, rspec_gte_3_10)	1m 43s
test (3.2, rails_6_1, rspec_lt_3_10)	2m 6s
test (3.2, rails_6_1, rspec_gte_3_10)	2m 9s
test (3.2, rails_7_0, rspec_lt_3_10)	2m 18s
test (3.2, rails_7_0, rspec_gte_3_10)	2m 18s
test (3.2, no_rails, rspec_lt_3_10)	1m 38s
test (3.2, no_rails, rspec_gte_3_10)	1m 35s
test (3.3, rails_6_1, rspec_lt_3_10)	2m 10s
test (3.3, rails_6_1, rspec_gte_3_10)	2m 15s
test (3.3, rails_7_0, rspec_lt_3_10)	2m 8s
test (3.3, rails_7_0, rspec_gte_3_10)	2m 25s
test (3.3, no_rails, rspec_lt_3_10)	1m 42s
test (3.3, no_rails, rspec_gte_3_10)	1m 36s
publish-docsite	12s
ready-to-merge	1s
	50m 24s

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