/usr/share/app-install/desktop/regexxer:regexxer.desktop is in app-install-data 14.04.0.
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 14 15 16 | [Desktop Entry]
X-AppInstall-Package=regexxer
X-AppInstall-Popcon=38
X-AppInstall-Section=universe
Version=1.0
Type=Application
Name=regexxer Search Tool
Comment=Search and replace using regular expressions
Exec=regexxer
Icon=regexxer
StartupNotify=true
Categories=GTK;GNOME;Development;
X-Ubuntu-Gettext-Domain=app-install-data
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