/usr/lib/mime/packages/transmission-qt is in transmission-qt 2.82-1.1ubuntu3.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | application/x-bittorrent; transmission-qt %s; description="Qt-based BitTorrent client"; test=test -n "$DISPLAY"
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