/usr/share/k3d/lsystem/fractint.ls is in k3d-data 0.8.0.3-3build1.
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 | # --- L-System Parser/Mutator --- Lj Lapre ----------------------------------
# CircularTile
3
15
10
&(90)+(90)X+X+X+X+X+X+X+X+X+X+X+X+X+X+X+X+X+X+X+X+X+X+X+X
X=[F+F+F+F[---X-Y]+++++F++++++++F-F-F-F]
Y=[F+F+F+F[---Y]+++++F++++++++F-F-F-F]
@
|