Title line overflows in doc

Describe the bug

While browsing the documentation for statsmodels, certain functions have really long names that overflow. The problem is the text doesn't wrap, causing some of the text to not be selectable or even visible (as showing in the image). Eg: https://www.statsmodels.org/stable/generated/statsmodels.regression.mixed_linear_model.MixedLM.html

Original:

Potential Fix 1:

I believe this could be a simple fix by enabling overflow to scroll. A potential solution could be adding the following to the documentation's CSS:

overflow: scroll;

Potential Fix 2:

I believe this could also be a simple fix by enabling overflow-wrap to anywhere or break-word. A potential solution could be adding the following to the documentation's CSS:

overflow-wrap: anywhere;

Start by opening the linked MixedLM documentation page and inspect the documentation CSS affecting long function-name headings or links. Reproduce the overflow in a narrow view, then verify that long names wrap or scroll without hidden or unselectable text. Confirm the fix on the affected page and similar generated documentation pages.