Spacing after \setminus too large
$A\setminus B$ produces excessive space before the B.
Live page with example: https://logrus.math.tecnico.ulisboa.pt/test (MathJax 3.0.1)
Counterexample: https://cdi1tp.math.tecnico.ulisboa.pt/solucoes/T1B20181110 (MathJax 2.7.x)
Observed in current versions of Firefox and Chromium on Linux.