/usr/share/lintian/overrides/plasma-widget-lancelot is in plasma-widget-lancelot 4:4.14.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | plasma-widget-lancelot: package-name-doesnt-match-sonames liblancelot-datamodels1 liblancelot2
plasma-widget-lancelot: no-symbols-control-file usr/lib/liblancelot-datamodels.so.1.7.0
plasma-widget-lancelot: no-symbols-control-file usr/lib/liblancelot.so.1.9.0
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