Custom tags and EPUB builder

[m-aciek]

Recently CPython's conf.py replaced self-closing tags with simpler, HTML5 ones. It broke EPUB builds as those are not XHTML-compatible.

Could sphinxext-opengraph rewrite custom meta tags to self-closing for EPUB builder?

Alternatives: (1) could sphinxext-opengraph disable custom meta tags for EPUB builder (or allow it through config)? Or: (2) could sphinxext-opengraph disable adding all tags to the layout for EPUB builder (or allow disabling it for EPUB builder through config)?

[AA-Turner]

PR welcome

[m-aciek]

In the meantime we started to skip custom tags for EPUB builds in CPython docs. Though og:description and < character inside it is causing failures for 8 (random) chapters. Would it be possible to merge #137?

@AA-Turner if you'd use some help with maintenance, could you possibly grant @TheTripleV with the permissions to merge and/or release?

PS, update: It looks like escaping HTML should work as well (render correct previews).

PPS, update: it looks like escaping HTML won't work. update: I've corrected the (1st) PS adding a link

[AA-Turner]

It looks like Vasista should have merge permissions:

[m-aciek]

Fixed with #142. Thank you @AA-Turner!