Bad HTML and rendering errors on various news items

[fingolfin]

Various news items sport invalid HTML in the author meta tag, leading to rendering errors, as in the attached screen shot. The cause of this is incorrect / missing quoting (double quotes are nested incorrectly)

Two examples where this happens:

• https://www.mathjax.org/mathjax-v2-7-now-available/
• https://www.mathjax.org/atypon-continues-as-mathjax-supporter-4/

[pkra]

Yes, I'm looking into it. I'm guessing an upstream jekyll change in gh-pages.

[pkra]

I suspect this is the right upstream bug: https://github.com/jekyll/jekyll-seo-tag/issues/186