/usr/share/puredata/doc/5.reference/sqrt~-help.pd is in puredata-core 0.48.1-3.
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 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | #N canvas 813 199 685 380 12;
#X obj 71 201 metro 500;
#X obj 71 176 r metro;
#X msg 575 106 \; metro 0;
#X msg 574 48 \; pd dsp 1 \; metro 1;
#X floatatom 55 102 0 0 0 0 - - -;
#X floatatom 55 258 0 0 0 0 - - -;
#X obj 574 21 loadbang;
#X obj 36 16 sqrt~;
#X text 88 18 - signal square root;
#X obj 55 152 sqrt~;
#X obj 55 225 snapshot~;
#X floatatom 54 341 9 0 0 0 - - -, f 9;
#X obj 54 285 t f f;
#X obj 54 312 *;
#X obj 55 128 sig~;
#X text 18 45 sqrt~ takes the approximate square root of the incoming
signal \, using a fast \, approximate algorithm which is probably accurate
to about 120 dB (20 bits).;
#X text 226 196 An older object \, q8_sqrt \, is included in Pd for
back compatibility but should probably not be used. It only gives about
8 bit accuracy., f 45;
#X text 434 332 updated for Pd version 0.47;
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