Lintian tag information: patch-modifying-debian-files (type: error)

Description (from lintian-explain-tags)

A patch stored in debian/patches/ modifies or creates files in the debian
folder, but that folder is already under the maintainer's exclusive
control.

It may be more appropriate to patch or create files in the upstream
directory hierarchy, but often it is easier to place a copy in the debian
folder.

Visibility: error
Show-Always: no
Check: debian/patches/quilt

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