Use app.set_html_assets_policy as 'always'

[humitos]

Tell Sphinx to always include assets in all HTML pages

Closes #119

[Daltz333]

I'm not sure of a clean way to convey to users that Sphinx 3.5->4.0.2 is broken? Can we throw an info statement?

[humitos]

I'm not sure of a clean way to convey to users that Sphinx 3.5->4.0.2 is broken?

It's not completely broken. There is only one case that doesn't work: embedding math formulas from pages that don't include math formulas. So, I don't think we should add code to communicate this particular case.

Can we throw an info statement?

I've added a warning note in https://sphinx-hoverxref.readthedocs.io/en/latest/usage.html#tooltip-with-content-that-needs-extra-rendering-steps that we need to update to mention that this is fixed in Sphinx 4.1.0

BTW, why you are mentioning 4.0.2 as the version that fixes this? I saw that my PR was tagged as 4.1.0: sphinx-doc/sphinx#9174

[ericholscher]

👍