/usr/share/doc/gcal-common/examples/magic.add is in gcal-common 3.6.3-3build2.
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 | #
# GNU nlsutils message catalog file format
#
0 string \336\22\4\225 GNU message catalog (little endian),
>4 lelong x revision %d,
>8 lelong x %d messages
0 string \225\4\22\336 GNU message catalog (big endian),
>4 belong x revision %d,
>8 belong x %d messages
|