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-rw-r--r--test/ruby/test_string.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 29bc2672ec..37278b192a 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -1221,6 +1221,7 @@ class TestString < Test::Unit::TestCase
assert_equal(S("124"), S("123").succ)
assert_equal(S("1000"), S("999").succ)
+ assert_equal(S("2.000"), S("1.999").succ)
assert_equal(S("No.10"), S("No.9").succ)
assert_equal(S("2000aaa"), S("1999zzz").succ)