/usr/lib/pd/extra/nusmuk-audio/saw2~-help.pd is in pd-nusmuk 20151113+repack-3.
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 14 15 16 17 18 | #N canvas 722 690 522 320 10;
#X obj 43 110 sig~ 333;
#X obj 43 194 dac~;
#X floatatom 43 63 5 0 0 0 - - -, f 5;
#X obj 137 197 oscillo~;
#X obj 43 162 *~ 0.1;
#X text 30 16 saw2~ is a band-limited sawtooth oscillator. similar
algorythm than saw~ \, but using difernt optimisations;
#X obj 43 86 mtof;
#X obj 42 137 saw2~;
#X obj 287 69 saw2_table_generation;
#X connect 0 0 7 0;
#X connect 2 0 6 0;
#X connect 4 0 1 0;
#X connect 4 0 1 1;
#X connect 6 0 0 0;
#X connect 7 0 4 0;
#X connect 7 0 3 0;
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