/usr/lib/pd/extra/rtc/key-bang.pd is in pd-rtclib 4.1-1.
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 50 61 251 167 10;
#X obj 79 46 inlet;
#X obj 34 103 outlet;
#X text 59 107 1997 by Karlheinz
Essl;
#X obj 34 45 key;
#X obj 34 76 sel \$1;
#X connect 0 0 4 1;
#X connect 3 0 4 0;
#X connect 4 0 1 0;
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