/usr/share/app-install/desktop/gerbv:gerbv.desktop is in app-install-data 0.12.04.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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X-AppInstall-Package=gerbv
X-AppInstall-Popcon=175
X-AppInstall-Section=universe
Version=1.0
Name=Gerbv Gerber File Viewer
GenericName=Gerber File Viewer
Comment=Gerber file viewer for PCB design
Type=Application
Exec=gerbv %F
Icon=gerbv
MimeType=application/x-gerber;application/x-excellon;
Categories=Engineering;Electronics;
X-Ubuntu-Gettext-Domain=app-install-data
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