Adjust Von Koch example description
Adjust Von Koch example description

Applied the same formatting suggestion as the Heighway dragon example
and also clarified a bit the description itself.

Signed-off-by: Paul Mabileau <a3aedf8c87c1af3dfeae5f57ddf6d5ae82ad981f@hotmail.fr>

sunjay/turtle,sunjay/turtle,sunjay/turtle