Update matplotlib canonical link

[jklymak]

Please see: https://discourse.matplotlib.org/t/canonical-documentation-have-moved/21863

[welcome]

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[neutrinoceros]

Hi @jklymak , thanks for fixing this. I note that we have 20 other occurrences of the url https://matplotlib.org/ in the repo ( git grep https://matplotlib.org/), some are pointing to specific versions of matplotlib but the majority isn't. Should those be changed as well ?

[jklymak]

Up to you - the old links should work via html refresh redirect - but the intersphinx link checker doesn't like the redirects and complains, so I was proactively pinging a few projects. Thanks!

[neutrinoceros]

Wrote a cute one-line to perform this sweeping change, can you run it ? or otherwise allow me to push to your branch ?

$ git ls-files --recurse-submodules | xargs egrep "https://matplotlib.org/[^3]" | cut -d ':' -f 1 | uniq | xargs sed -i -e "s|https://matplotlib.org|https://matplotlib.org/stable|g"

[jklymak]

Feel free to push to branch or close this and start fresh. I just made this change directly on GitHub and don't have yt downloaded locally (I'd lose my oceanographer license 😉 )

[matthewturk]

@jklymak we really really want to talk a lot more about oceanography! I really hope the two are not in conflict. :)

[neutrinoceros]

pushed :)

[neutrinoceros]

I think I reverted all the 404 errors, thanks @cphyc

[Xarthisius]

@yt-fido test this please

[cphyc]

I think I tested all URLs and they're all non-404!

[welcome]

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