I can confirm that Anki 2.1.55 Beta fixes the spurious addition of non-breaking spaces within equations, but is still inserted after every in-inline MathJax equation
For example, if I type "(a = b) " (with a space at the end), then the resulting HTML is \(a = b\) .
Is this the intended behavior? The nonbreaking spaces appear to have no effect on where line breaks actually occur after equations.
Furthermore, if ends up inside a MathJax equation (as often happens in my notes), then the MathJax preview fails to render.
