AG4 Python tutorial update.
AG4 Python tutorial update.

python-tutorial-40.html

Craig discovered that a change he requested didn't make
it into the last release, so I'm being doubly sure it
gets into the NEXT release.  I did make the change but
it didn't get through the system somehow.

Added this to RELNOTES: No, nothing worthy of comment.

Test Suite run? No.

franzinc/agraph-python,franzinc/agraph-python,franzinc/agraph-python,franzinc/agraph-python