Inconsistent coloring for variable names in a multiple variable `val` statement

[soronpo]

Notice in the following example x1 is colored differently than x2 and x3

class Foo {
  val x1, x2, x3 = 0
}

[nicolasstucki]

We might need to handle these ones in the same way (i.e. without coloring).

val x1, x2, x3 = ...
val (x1, x2, x3) = ...
val (None, Some(x2), x3) = ...

The only way to make this one work with colors is using look behind for the 2nd, 3rd, ... variables. But this feature is still missing in JS.