René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"triplot, etc examples broken by merged PR #3182","articleBody":"The recently merged PR #3182 removed 2 lines in each of the examples `tricontour_demo.py`, `tripcolor_demo.py` and `triplot_demo.py`.  These lines needed to be altered, not removed.  Some of the plots produced are clearly wrong, e.g.\n![erroneous_triplot](https://cloud.githubusercontent.com/assets/580326/3513659/03c40324-06c5-11e4-84e0-2674fc9685db.png)\nGeneral rules for developers:\n1) If you change an example script, run it before and after your changes to see if the output is the same.\n2) If someone submits a PR that touches 60 files just prior to a release, either park it until after the release or be very sure it doesn't break anything.\n","author":{"url":"https://github.com/ianthomas23","@type":"Person","name":"ianthomas23"},"datePublished":"2014-07-08T17:35:43.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/3199/matplotlib/issues/3199"}