Correction for the fix for Bug 3508 - Persistent storage support breaks Linux compatibility.
A 2nd `make install' will fail attempting to create symlink libnvmemmory.so already created by 1st install.
Install should pre-emptively delete it.
width = 800
height = 600
canvwidth = 1200
canvheight = 900
shape = arrow
mode = standard
resizemode = auto
fillcolor = ""
title = Python turtle graphics demo.