/usr/share/doc/racket/release/stamp.sxref is in racket-common 6.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | ("831e0b0b92ee95fc88baad2ed1b54a1d9f7346747277cfd69bca979a6ba3861312fa05bb8d6b9795" "c7a6e669961eabf8b60bb84cd7d316191aa1e09467bac8c41d5362e9129385445cf0460cbc5db6ea" "78c9c50af1e7be87d9e1bf32c56c1f56e3fa8c14")
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