/usr/lib/pd/extra/pdstring/wchars2any.pd is in pd-pdstring 0.10.2-3.
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 | #N canvas 398 276 384 218 10;
#X obj 68 22 inlet;
#X obj 221 22 inlet;
#X obj 68 112 bytes2any \$1 \$2;
#X obj 68 73 wchars2bytes \$1;
#X obj 68 146 outlet;
#X obj 168 146 outlet;
#X connect 0 0 3 0;
#X connect 1 0 2 1;
#X connect 2 0 4 0;
#X connect 2 1 5 0;
#X connect 3 0 2 0;
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