Java implementation of JSON.pretty_generate generates different output to MRI for at least an empty hash #440
Description
From jruby/jruby#6338.
require 'json'
puts JSON.pretty_generate({})% chruby 2.5.7
% ruby -v test.rb
ruby 2.5.7p206 (2019-10-01 revision 67816) [x86_64-darwin19]
{
}
% chruby jruby 9.2.11.1
% ruby -v test.rb
jruby 9.2.11.1 (2.5.7) 2020-03-25 b1f55b1a40 OpenJDK 64-Bit Server VM 25.252-b14 on 1.8.0_252-b14 +jit [darwin-x86_64]
{
}