Lintian tag information: changelog-not-compressed-with-max-compression (type: warning)

Description (from lintian-explain-tags)

Changelog files should be compressed using "gzip -9"; i.e., using the
maximum compression level via the -9 option to gzip.

Please refer to Changelog files and release notes (Section 12.7) in the
Debian Policy Manual for details.

Visibility: warning
Show-Always: no
Check: debian/changelog

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