This file is indexed.

/usr/share/smplayer/themes/Oxygen/README.txt is in smplayer-themes 1:14.9.0-1.

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

The actual contents of the file can be viewed below.

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Icons taken from http://www.gnome-look.org/content/show.php/Oxygen+Refit+%5BIcons%5D?content=64589
License: LGPL

Icon theme created for SMPlayer by Ricardo Villalba <rvm@users.sourceforge.net>

Theme modified by Dariusz Jakoniuk <pipaceliny@interia.pl> using some
of the original Oxygen icons (dual license: Creative Common 
Attribution-ShareAlike 3.0 License or the GNU Library General Public License).