/usr/share/app-install/desktop/dochelp:dochelp.desktop is in app-install-data 15.10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | [Desktop Entry]
X-AppInstall-Package=dochelp
X-AppInstall-Popcon=0
X-AppInstall-Section=universe
Name=Dochelp
Comment=Utility to browse system documentation
Exec=sensible-browser file:///var/lib/dochelp/documents.html
Type=Application
Categories=Development;
Terminal=false
X-Ubuntu-Gettext-Domain=app-install-data
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