This file is indexed.

/usr/share/mate-about/mate-version.xml is in mate-desktop-common 1.20.1-2ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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<?xml version="1.0" encoding="UTF-8"?>
<mate-version>
  <platform>1</platform>
  <minor>20</minor>
  <micro>1</micro>
  
</mate-version>