Lintian tag information: upstream-metadata-yaml-invalid (type: warning)

Description (from lintian-explain-tags)

The DEP 12 metadata file is not well formed. The formatting need to be
adjusted to match the YAML specification.

Please refer to https://dep-team.pages.debian.net/deps/dep12/ for details.

Visibility: warning
Show-Always: no
Check: debian/upstream/metadata

Show affected packages