/usr/lib/mime/packages/scratch is in scratch 1.4.0.6~dfsg1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | application/x-scratch-project; scratch %s; test=test "$DISPLAY" != ""; description=Scratch Application; nametemplate=%s.sb; priority=6
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