/usr/share/puredata/doc/5.reference/text-help.pd is in puredata-core 0.45.4-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 | #N canvas 74 127 544 214 12;
#X text 281 174 updated for Pd version 0.26;
#X text 107 13 comments;
#X text 38 73 This is Pd's help window for comments \, which don't do anything.;
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