Lintian tag information: invalid-potfiles-in (type: warning)

Description (from lintian-explain-tags)

Errors were found in the debian/po/POTFILES.in file.

Please make sure that all strings marked for translation are in uniform
encoding (say UTF-8) then prepend the following line to POTFILES.in and
rerun intltool-update.

[encoding: UTF-8]

Please refer to Bug#849912 and Bug#883653 for details.

Visibility: warning
Show-Always: no
Check: debian/po-debconf

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