This file is indexed.

/usr/lib/puredata/extra/rev2~-help.pd is in puredata-extra 0.46.7-3.

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

The actual contents of the file can be viewed below.

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#X msg 279 150 -0.25 \, 0.25 \$1;
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#X text 136 96 tone;
#X text 135 112 pitch;
#X text 114 185 level \, dB;
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#X text 158 209 liveness \, 0-100;
#X text 505 330 modified for Pd version 0.37;
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#X text 238 260 HF damping \, percent;
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#X text 141 324 output level \, dB;
#X text 281 8 REV2~ - a simple 1-in \, 4-out reverberator;
#X text 95 35 tone;
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#X text 231 37 The creation arguments (level \, liveness \, crossover
frequency \, HF damping) may also be supplied in four inlets as shown.
The "liveness" (actually the internal feedback percentage) should be
100 for infinite reverb \, 90 for longish \, and 80 for short. The
crossover frequency and HF damping work together: at frequencies above
crossover \, the feedback is diminished by the "damping" as a percentage.
So zero HF damping means equal reverb time at all frequencies \, and
100% damping means almost nothing above the crossover frequency gets
through.;
#X text 132 130 (60 for;
#X text 115 150 middle C);
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