All reports of brace-expansion-in-debhelper-config-file for the archive. The extended description of this tag is:

This debhelper config file appears to use shell brace expansion (such as {foo,bar}) to specify files. This happens to work due to an accident of implementation but is not a supported feature. Only ?, *, and [...] are supported.

Refer to the debhelper(1) manual page for details.

Severity: normal, Certainty: possible

Check: debhelper, Type: source

This tag has not been emitted in any package tested by Lintian.