/usr/share/xslthl/highlighters/ is in libxslthl-java 2.1.3-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xslthl/highlighters/bourne-hl.xml
/usr/share/xslthl/highlighters/c-hl.xml
/usr/share/xslthl/highlighters/cmake-hl.xml
/usr/share/xslthl/highlighters/cpp-hl.xml
/usr/share/xslthl/highlighters/csharp-hl.xml
/usr/share/xslthl/highlighters/css21-hl.xml
/usr/share/xslthl/highlighters/delphi-hl.xml
/usr/share/xslthl/highlighters/ini-hl.xml
/usr/share/xslthl/highlighters/java-hl.xml
/usr/share/xslthl/highlighters/javascript-hl.xml
/usr/share/xslthl/highlighters/lua-hl.xml
/usr/share/xslthl/highlighters/m2-hl.xml
/usr/share/xslthl/highlighters/myxml-hl.xml
/usr/share/xslthl/highlighters/perl-hl.xml
/usr/share/xslthl/highlighters/php-hl.xml
/usr/share/xslthl/highlighters/python-hl.xml
/usr/share/xslthl/highlighters/ruby-hl.xml
/usr/share/xslthl/highlighters/sql1999-hl.xml
/usr/share/xslthl/highlighters/sql2003-hl.xml
/usr/share/xslthl/highlighters/sql92-hl.xml
/usr/share/xslthl/highlighters/tcl-hl.xml
/usr/share/xslthl/highlighters/upc-hl.xml
/usr/share/xslthl/highlighters/xslthl-config.xml