[ruby/bigdecimal] Fix test_limit
Keep the default value of BigDecimal.limit by BigDecimal.save_limit to avoid failures of the other test methods due to the unexpected limit.
https://github.com/ruby/bigdecimal/commit/bdc1cc6585
[ruby/bigdecimal] Fix test_limit
Keep the default value of BigDecimal.limit by BigDecimal.save_limit
to avoid failures of the other test methods due to the unexpected limit.
https://github.com/ruby/bigdecimal/commit/bdc1cc6585