Another escape hatch for missing backtick in pattern lint

[som-snytt]

Reproduction steps

Scala version: 2.13.16

    @inline def matches[A](a: A)(pf: PartialFunction[A, Unit]): Boolean = pf.isDefinedAt(a)

    def sameTypeAndSameCaseClass = tp1 match {
      case tp1: TypeRef               => matches(tp2) { case tp2: TypeRef if isSameTypeRef(tp1, tp2) => }
    }

Problem

[warn] .../scala/src/reflect/scala/reflect/internal/tpe/TypeComparers.scala:251:62: Name tp2 is already introduced in an enclosing scope as value tp2 at line 205. Did you intend to match it using backquoted `tp2`?
[warn]       case tp1: TypeRef               => matches(tp2) { case tp2: TypeRef if isSameTypeRef(tp1, tp2) => }
[warn]                                                              ^

It would be nice if the lint noticed that value tp2 is an input to the application, much as it recognizes

tp2 match { case tp2: TypeRef => }

where the selector expression is f(tp2) or just tp2 itself.