/usr/share/psychtoolbox-3/PsychTests/TextFontTest.m is in psychtoolbox-3-common 3.0.12.20160126.dfsg1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | function TextFontTest
% Test setting the text font.
try;
w=Screen('OpenWindow',0);
% Screen(w,'TextFont','Chicago');
Screen('TextFont',w,'Chicago');
clear screen
catch;
clear screen
% rethrow(lasterror);
end
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