/usr/share/gimp/2.0/brushes/Calligraphic-Brush-3.vbr is in gimp-data 2.6.12-1ubuntu1.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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1.0
Calligraphic Brush#3
10.000000
2.962771
1.000000
2.075472
45.000000
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