/usr/lib/pd/extra/pdstring/any2wchars.pd is in pd-pdstring 0.10.2-4.
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 | #N canvas 398 18 328 196 10;
#X obj 54 20 inlet;
#X obj 154 20 inlet;
#X obj 54 62 any2bytes \$1 \$2;
#X obj 54 134 outlet;
#X obj 54 90 bytes2wchars \$1;
#X connect 0 0 2 0;
#X connect 1 0 2 1;
#X connect 2 0 4 0;
#X connect 4 0 3 0;
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