/usr/share/doc/racket/algol60/blueboxes.rktd is in racket-doc 6.7-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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((3) 0 () 1 ((q lib "algol60/algol60.rkt")) () (h ! (equal) ((c form c (c (? . 0) q include-algol)) q (0 . 2)) ((c form c (c (? . 0) q literal-algol)) q (36 . 2))))
syntax
(include-algol path-string)
syntax
(literal-algol string ...)
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