/usr/share/kde4/config/planrc is in calligraplan 1:2.8.1-1-0ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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DockerPlugins=Scripting
DockerPluginsDisabled=calligradockers,textdocumentinspection
FlakePlugins=
FlakePluginsDisabled=
ShapePlugins=
ShapePluginsDisabled=
|