/usr/share/k3d/lsystem/spiral-design.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 ----------------------------------
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#
A
#
A=[-A]F+F+F+F+F+F+F+F+F+F+F+F+F+F+F+F+F+F+F
@
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