[NTG-context] Bug in spacement in mathmode mkiv

Hi Hans, I noticed that in math mode the spacement of some symbols are incorrect while using mkiv (they are correct in mkii). Here is an example %%%%% begin example \starttext Set $a := bc^{-1}$. \stoptext %%%%% end example In this example, there should be a space before and after ":=" as one may see it readily in mkii (and indeed in plain TeX…). Best regards: OK