I can't explain this:
@interact
def _(a_1=('\(a_1\)',3),a_2=('$a_2$',2)):
print a_1^2,a_2^2
The \(\) style LaTeX looks fine, but the $$ version keeps them. I don't typically label these, but it happens here. I don't *think* this occurs in the various notebooks, though I haven't tried lately... anyway, curious if anyone has ideas on this behavior. I could work around it for my use case because I don't usually need it, but it does look much nicer if one were to have a fairly complicated interact with layout etc.