Qualified infix functions incorrectly highlighted

[tomsmalley]

Sorry for making so many issues, I just started using vscode and I'm just reporting things as I come across them. I can collect them into a single issue in future if you would prefer, since they are all very minor issues.

[JustusAdam]

I have noticed the same thing before. I'll have a look at it when I get the time, you can try yourself too.