/usr/share/doc/freefem++/examples/examples-bamg/square/octogone_g.mesh is in freefem++-doc 3.19.1-1.
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 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | MeshVersionFormatted 0
MaximalAngleOfCorner 44
Dimension 2
Vertices 8
1 0 1
.7071067811865476 .7071067811865476 1
0 1 1
-.7071067811865476 .7071067811865476 1
-1 0 1
-.7071067811865476 -.7071067811865476 1
0 -1 1
.7071067811865476 -.7071067811865476 1
Edges 8
1 2 1
2 3 1
3 4 1
4 5 1
5 6 1
6 7 1
7 8 1
8 1 1
hVertices
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
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