string and keywords not highlighted inside a non-block function expr

[Gama11]

class A {
    function f() return new B("name", null, this);
}

---

see vshaxe/vshaxe#81

[Gama11]

Also happens with these cases:

function(_) trace("foo");
function(_) $type("foo");

[kevinresol]

Any plan to fix this? Because in a string interpolation it also screws up things after the function.

Note that the abc at the end should be highlighted as string.

[Gama11]

Oh, I've tried, it's just not a simple fix.