Fix can't modify frozen String error in XmlMini_JDOM
#30490
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Without this, `XmlMini_JDOM` raises an error as follwing:
```
RuntimeError: can't modify frozen String
org/jruby/RubyString.java:2264:in `concat'
activesupport/lib/active_support/xml_mini/jdom.rb:177:in `block in empty_content?'
org/jruby/RubyRange.java:485:in `each'
activesupport/lib/active_support/xml_mini/jdom.rb:174:in `empty_content?'
activesupport/lib/active_support/xml_mini/jdom.rb:86:in `collapse'
activesupport/lib/active_support/xml_mini/jdom.rb:66:in `merge_element!'
activesupport/lib/active_support/xml_mini/jdom.rb:84:in `block in collapse'
org/jruby/RubyRange.java:485:in `each'
activesupport/lib/active_support/xml_mini/jdom.rb:82:in `collapse'
activesupport/lib/active_support/xml_mini/jdom.rb:66:in `merge_element!'
activesupport/lib/active_support/xml_mini/jdom.rb:51:in `parse'
activesupport/lib/active_support/xml_mini.rb:101:in `parse'
```
We already have tests about `XmlMini_JDOM`. But it is not running in CI.
https://github.com/rails/rails/blob/master/activesupport/test/xml_mini/jdom_engine_test.rb
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r? @schneems (@rails-bot has picked a reviewer for you, use r? to override) |
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Thanks! |
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Why aren't the tests running in CI? |
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Without this,
XmlMini_JDOMraises an error as follwing:We already have tests about
XmlMini_JDOM. But it is not running in CI.https://github.com/rails/rails/blob/master/activesupport/test/xml_mini/jdom_engine_test.rb