Lintian tag information: multiline-architecture-field (type: error)

Description (from lintian-explain-tags)

The values in the Architecture field of the debian/control file may not be
separated by anything other than spaces. The values must be in a single
line of text.

Please refer to Architecture (Section 5.6.8) in the Debian Policy Manual
for details.

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

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