/usr/lib/pd/extra/mapping/autoscale-help.pd is in pd-mapping 0.2.1-2.
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 floatatom 26 127 0 0 0 0 - - -;
#X obj 2 -10 cnv 15 450 20 empty empty autoscale 2 11 1 18 -233017
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#X text 18 15 [autoscale] scales a stream of numbers based on an output
range set as arguments \, and an input range which is set dynamically.
;
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#X msg 186 347 reset;
#X text 13 162 If you use [autoscale] with no arguments \, then the
output range defaults to 0-1.;
#X msg 239 347 bang;
#X text 14 192 You can also set the output min and max using the 2nd
and 3rd inlets:;
#X obj 295 347 tgl 15 1 empty empty empty 0 -6 0 8 -262144 -1 -1 1
1;
#X text 14 308 The [reset( message or banging the 4th inlet resets
the stored max and min to zero. 0 disables the auto-tracking \, 1 re-enables
it:;
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#X obj 215 550 pack float float;
#X msg 148 471 save;
#X msg 215 571 set load \$1 \$2;
#X msg 150 494 load 1 11;
#X msg 323 502 bang;
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#X obj 297 97 autoscale -4095 4095;
#X obj 150 97 autoscale -0.01 0.01;
#X obj 158 265 autoscale;
#X obj 158 379 autoscale;
#X obj 26 97 autoscale;
#X obj 127 527 autoscale 0 1 ______________;
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#X obj 171 234 nbx 3 16 -1e+37 1e+37 0 1 empty empty min 40 8 0 10
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#N canvas 462 82 494 344 META 0;
#X text 12 235 HELP_PATCH_AUTHORS "pd meta" information added by Jonathan
Wilkes for Pd version 0.42.;
#X text 12 25 LICENSE GPL v2;
#X text 12 45 DESCRIPTION scale a stream of numbers based on an output
range set as arguments \, and an input range set dynamically;
#X text 12 75 INLET_0 float reset save load;
#X text 12 95 INLET_1 float;
#X text 12 115 INLET_2 float;
#X text 12 135 INLET_3 float bang;
#X text 12 155 OUTLET_0 float;
#X text 12 175 OUTLET_1 float;
#X text 12 195 OUTLET_2 float;
#X text 12 215 AUTHOR Cyrille Henry and Hans-Christoph Steiner;
#X text 12 5 KEYWORDS control abstraction;
#X restore 402 587 pd META;
#X text 16 424 The dump message allows "autoscale" to output the min
and max of the input data. this allow user to save this data in order
to load the same callibration with a loadbang :;
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