/usr/lib/python3/dist-packages/pyregion/tests/data/test03_fk5.reg is in python3-pyregion 2.0-2ubuntu1.
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 | # Region file format: DS9 version 4.1
global color=green dashlist=8 3 width=1 font="helvetica 10 normal roman" select=1 highlite=1 dash=0 fixed=0 edit=1 move=1 delete=1 include=1 source=1
fk5
ellipse(20:41:00.281,+29:29:15.89,131959",8559.56",357.84)
box(19:28:38.535,+7:15:35.29,153358",25678.7",40) # color=white
polygon(19:07:03.207,+11:10:17.68,19:05:49.490,+13:37:37.96,19:02:25.027,+10:23:12.68,18:56:03.686,+8:34:30.53,19:02:38.855,+8:43:34.52,19:05:46.348,+8:55:32.97,19:04:35.006,+10:00:26.45,19:07:18.023,+9:23:23.72,19:11:37.745,+11:12:20.02,19:07:18.345,+10:28:49.11,19:09:49.324,+12:48:22.55) # width=3
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