fix(jruby): first_element_child properly returns nil #2844
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when only non-element children exist. Previously this NPEd.
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What problem is this PR intended to solve?
Fixes #2802
On JRuby,
first_element_childproperly returns nil when only non-element children exist. Previously this NPEd.Have you included adequate test coverage?
Yes!
Does this change affect the behavior of either the C or the Java implementations?
This brings the Java implementation into alignment with the C implementation.