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-rw-r--r--test/ruby/test_regexp.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/test/ruby/test_regexp.rb b/test/ruby/test_regexp.rb
index dbfe4d7aeb..24ac731d8e 100644
--- a/test/ruby/test_regexp.rb
+++ b/test/ruby/test_regexp.rb
@@ -24,4 +24,8 @@ class TestRegexp < Test::Unit::TestCase
Regexp.new(s, nil, "u")
end
end
+
+ def test_ruby_dev_31309
+ assert_equal('Ruby', 'Ruby'.sub(/[^a-z]/i, '-'))
+ end
end