Insert 'using' when completing inside using params

[tgodzik]

Compiler version

3.7.0-RC1

Minimized code

//> using scala 3

def hello(using String): Unit = ???

@main def main1(): Unit =

  val str = "hello"
  hello(st@@)

Output

//> using scala 3

def hello(using String): Unit = ???

@main def main1(): Unit =

  val str = "hello"
  hello(str)

Expectation

//> using scala 3

def hello(using String): Unit = ???

@main def main1(): Unit =

  val str = "hello"
  hello(using str)

since we know that we are in using params