/usr/share/k3d/lsystem/spiral-form.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 ----------------------------------
20
10
100
a
a=Fs+;'a
s=[::c!!!!&&[b]^^^^[b]]
b=F!+F+;'b
@
|