MusicXML exporting: the wrong line-end type is exported for brackets.

[JosephBuchholz]

Issue type

Other type of issue

Bug description

Brackets with a line-end type of 'both' are not exported to MusicXML correctly. Instead the line-end type is exported as 'down':

<direction placement="below">
  <direction-type>
    <bracket type="stop" number="1" line-end="down" end-length="6"/>
  </direction-type>
</direction>

should be:

<direction placement="below">
  <direction-type>
    <bracket type="stop" number="1" line-end="both" end-length="6"/>
  </direction-type>
</direction>

Steps to reproduce

1. Create a MuseScore project that has a bracket with a double line end. For example a let-ring or P.M. element
2. Export to MusicXML
3. Import the exported MusicXML file back in to MuseScore
4. Notice the line end for the bracket has changed

Screenshots/Screen recordings

Before export:

After export:

MuseScore Version

OS: Windows 10 Version 2009, Arch.: x86_64, MuseScore version (64-bit): 4.0.2-230651553, revision: github-musescore-musescore-dbe7c6d

Regression

I don't know

Operating system

Windows 11

Additional context

The MuseScore and MusicXML files:
files.zip