Fix implicit parameter list capture

[keynmol]

This particular case seems to have slipped through in #51

Wasn't working before Oli's PR as well.

---

Problem is breaking apart multiple argument lists - adding recordValue in the wrong place (between an implicit and non-implicit parameter list), seems to break things.

The way to fix it is to avoid putting recorders on the implicit parameters (not tearing them away from a method call).

This, obviously, is the stuff of nightmares in Scala 3, where you can do anything:

scala> def hello(x: String)(using Int, List[String])(t: Double)(using what: Set[Int]) = ???
def hello
  (x: String)
    (using x$2: Int, x$3: List[String])
      (t: Double)(using what: Set[Int]): Nothing

[keynmol]

.symbol can be null 🎉 :D

[eed3si9n]

Nice. Thanks for the fix!

[keynmol]

The journey is not over, apparently :D I spotted this in my own project, and even publishing with this fix doesn't seem to help it.

I will keep reproducing and fixing I guess :-/

[keynmol]

Gonna keep my notes

I added a Scala3-only test, using givens instead of implicits. And that's what broke. Because in the AST, if you use givens:

------------------------------                                        
expression: z.hello[scala.Int](50)(given_Test_Int)                                
parameters: List(Ident(given_Test_Int))
flags: List(Flags.Final | Flags.Lazy | Flags.Module | Flags.StableRealizable)
apply on: z.hello[scala.Int](50)                                                

But if you use implicits:

------------------------------ 
z.hello[scala.Int](50)(testInt)
List(Ident(testInt))           
List(Flags.Implicit)           
z.hello[scala.Int](50)         

And the problem is that using givens this is not passing the flags check :(

[keynmol]

@eed3si9n @Baccata I think this is in a better state for review.

The reason original fix was insufficient is that Flags.Given is not showing up on the parameters: https://github.com/lampepfl/dotty/blob/master/library/src/scala/quoted/Quotes.scala#L3968

For the simple reason that it's not mentioned here :) https://github.com/lampepfl/dotty/blob/master/compiler/src/scala/quoted/runtime/impl/printers/Extractors.scala#L37

[eed3si9n]

Squash the commits please, and I think it's good to go.