[Bug]: XML/Text mode changes XML (only when recognized as well-formed XML)

首先，在 Windows 上的 DB4S 3.13.1 中使用提供的表值复现 XML/Text 值查看器的行为，然后将其与添加前缀后的相同值进行比较，使其不被识别为格式良好的 XML。当识别为 XML 时，两种模式都能完全保留原始值，且不添加命名空间或更改属性格式，即视为完成。

What did you do?

Created a table with cell values like (copied directly from table cell:

<?xml version="1.0" encoding="UTF-8"?>
<xml xmlns="http://www.wipo.int/classifications/ipc/masterfiles">
  <note type="none">
    <noteParagraph>
      <text>Auxiliary devices attached to machines of a different kind, e.g. harrows attached to ploughs, see relevant groups in <mref endRef="A01B0047000000" ref="A01B0003000000" /> for the machines.</text>
    </noteParagraph>
  </note>
</xml>

What did you expect to see?

In both XML and Text modes the same value above.

What did you see instead?

Copied from value viewer (XML and Text mode alike):

<?xml version='1.0' encoding='UTF-8'?>
<xml xmlns="http://www.wipo.int/classifications/ipc/masterfiles">
    <note xmlns="http://www.wipo.int/classifications/ipc/masterfiles" type="none">
        <noteParagraph xmlns="http://www.wipo.int/classifications/ipc/masterfiles">
            <text xmlns="http://www.wipo.int/classifications/ipc/masterfiles">Auxiliary devices attached to machines of a different kind, e.g. harrows attached to ploughs, see relevant groups in <mref xmlns="http://www.wipo.int/classifications/ipc/masterfiles" ref="A01B0003000000" endRef="A01B0047000000"/> for the machines.</text>
        </noteParagraph>
    </note>
</xml>

This only happens when value is recognized as well-formed XML. If I add a symbol at the beginning in the table cell, the value is no longer recognized as well-formed XML, and all fake "xmlns=..." are gone.

DB4S Version

3.13.1

What OS are you seeing the problem on?

Windows

OS version

Windows 10 LTSC 2019

Relevant log output

Prevention against duplicate issues

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