/usr/share/k3d/lsystem/cello-plant.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 11 12 13 14 15 16 17 18 19 | # --- L-System Parser/Mutator --- Lj Lapre ----------------------------------
10
10
80
FS
S=WZ'!cS
W=R%R>>>>>>>>>R%R>>>>
R=[da%a%g%g]
a=[{nmmn}]
g=[NMMNL]
m=+zm
n=-zn
M=+ZM
N=-ZoN
d=^d
L=Z';+Z';+Z';+Z';+[&&&l]L
l=[c{--z++z++z--|--z++z++z}]
o=[---------!!!'''cZl]
@
|