(URGENT) Escaped XML characters should remain escaped in XML output

[ronaldtse]

From:

• Some specs failing due to rendering XML-escaped characters metanorma/niso-jats#17

This seems to be a lutaml-model XML writing bug. It should always keep special characters in strings "escaped".

  1) Niso::Jats::Article with bmj_sample.xml behaves like a serializer round-trips with xml-c14
     Failure/Error: expect(output).to be_analogous_with(input)
     
       DIFF 1: expected node: <source>Continuity of care: report of a scoping exercise for
                   the national co-ordinating centre for NHS Service Delivery and
                   Organisation R (NCCSDO), Summer 2000</source>
               actual node  : <source>Continuity of care: report of a scoping exercise for
                   the national co-ordinating centre for NHS Service Delivery and
                   Organisation R&amp;D (NCCSDO), Summer 2000</source>
               diff from    : Continuity of care: report of a scoping exercise for the national co-ordinating centre for NHS Service Delivery and Organisation R (NCCSDO), Summer 2000
               diff to      : Continuity of care: report of a scoping exercise for the national co-ordinating centre for NHS Service Delivery and Organisation R&D (NCCSDO), Summer 2000
     Shared Example Group: "a serializer" called from ./spec/niso/jats/article_spec.rb:6
     # ./spec/support/shared_examples.rb:17:in `block (2 levels) in <top (required)>'

  2) Niso::Jats::Article with pnas_sample.xml behaves like a serializer round-trips with xml-c14
     Failure/Error: expect(output).to be_analogous_with(input)
     
       DIFF 1: expected node: <role degree-contribution="supporting" vocab="CRediT" vocab-identifier="http://credit.niso.org" vocab-term="Writing — Review &amp; Editing" vocab-term-identifier="http://credit.niso.org/contributor-roles/writing-review-editing/">Writing
                   — Review  Editing</role>
               actual node  : <role degree-contribution="supporting" vocab="CRediT" vocab-identifier="http://credit.niso.org" vocab-term="Writing — Review &amp; Editing" vocab-term-identifier="http://credit.niso.org/contributor-roles/writing-review-editing/">Writing
                   — Review &amp; Editing</role>
               diff from    : Writing — Review Editing
               diff to      : Writing — Review & Editing