Merge pull request matplotlib#17074 from SidharthBansal/patch-8

DOC: Change wording in Lifecycle of a Plot

Author: tacaswell

tutorials/introductory/lifecycle.py

@@ -12,7 +12,7 @@
 
 .. note::
 
-    This tutorial is based off of
+    This tutorial is based on
     `this excellent blog post <http://pbpython.com/effective-matplotlib.html>`_
     by Chris Moffitt. It was transformed into this tutorial by Chris Holdgraf.