Lintian tag information: missing-separator-between-items (type: error)

Description (from lintian-explain-tags)

The named field in the debian/control file is supposed to list items that
are separated by commas or pipes. A separator seems to be missing.

Needless to say, it can lead to bogus or incomplete package relationships.

Visibility: error
Show-Always: no
Check: debian/control/field/relation

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