/usr/share/k3d/lsystem/spiral-bush.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 10 | # --- L-System Parser/Mutator --- Lj Lapre ----------------------------------
10
10
80
C
C=[cH]z!>C
H=[^^^G]%[^^^G]>>>H
G=F!^+F^+;'[&&&L]G
L=[c{--z++z++z--|--z++z++z}]
@
|