This file is indexed.

/usr/share/octave/site/m/octave-epstk/eusage.m is in octave-epstk 2.4-3.

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

The actual contents of the file can be viewed below.

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% eusage(text)
% written by stefan.mueller@fhr.fraunhofer.de (C) 2010 
function eusage(text)
text=sprintf('syntax error of epsTk function\nusage: %s',text);
disp('--------------------------------------------------------------------------------');
disp(text);
disp('--------------------------------------------------------------------------------');
error(' ');