/usr/share/lintian/overrides/golang-github-klauspost-compress-dev is in golang-github-klauspost-compress-dev 0.0~git20151221.0.2dd54ae-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # This is a test file
package-contains-timestamped-gzip usr/share/gocode/src/github.com/klauspost/compress/gzip/testdata/issue6550.gz
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