fails:ObjectSpace.dump dumps the content of object as JSON
fails:ObjectSpace.dump dumps to string when passed output: :string
fails:ObjectSpace.dump dumps to string when :output not specified
fails:ObjectSpace.dump dumps to a temporary file when passed output: :file
fails:ObjectSpace.dump dumps to a temporary file when passed output: :nil
fails:ObjectSpace.dump dumps to stdout when passed output: :stdout
fails:ObjectSpace.dump dumps to provided IO when passed output: IO
fails:ObjectSpace.dump raises ArgumentError when passed not supported :output value
