Adjust usages in tests

Author: som-snytt

repl/test-resources/type-printer/source-compatible

@@ -4,14 +4,14 @@ scala> val m = new Bag { val f = 23; def g = 47; def h(i: Int): Int = i; var i =
 val m:
   Bag{
     val f: Int; def g: Int; def h(i: Int): Int; val i: Int;
-      def i_=(x$1: Int): Unit; type N = Int; val l: List[Int];
+      def i_=(`x$1`: Int): Unit; type N = Int; val l: List[Int];
       def p[T](t: T): String
   } = Bag()
-scala> type t = Bag { val f: Int; def g: Int; def h(i: Int): Int; val i: Int; def i_=(x$1: Int): Unit; type N = Int; val l: List[Int]; val s: String @unchecked }
+scala> type t = Bag { val f: Int; def g: Int; def h(i: Int): Int; val i: Int; def i_=(`x$1`: Int): Unit; type N = Int; val l: List[Int]; val s: String @unchecked }
 // defined alias type t
    =
     Bag{
       val f: Int; def g: Int; def h(i: Int): Int; val i: Int;
-        def i_=(x$1: Int): Unit; type N = Int; val l: List[Int];
+        def i_=(`x$1`: Int): Unit; type N = Int; val l: List[Int];
         val s: String @unchecked
     }

tests/init/warn/java1.scala

@@ -5,7 +5,7 @@ class A extends Spliterator.OfDouble:
   def characteristics() = 10
   def estimateSize() = 10
   def trySplit() = ???
-  def tryAdvance(x$0: java.util.function.DoubleConsumer): Boolean = false
+  def tryAdvance(`x$0`: java.util.function.DoubleConsumer): Boolean = false
 
   val m = n + 1
   val n = 10     // warn

tests/neg/i15381.scala

@@ -1,6 +1,6 @@
 //> using options -Vprint:parser
 
-case class $[A](value: A)
+case class `$`[A](value: A)
 
 def g: Int = $        // error
 

tests/neg/i4986c.scala

@@ -14,7 +14,7 @@ class Outer[A] {
   }
 }
 
-trait X$Y
+trait `X$Y`
 
 @implicitNotFound(msg = "There's no U[${X}, ${Y}, ${Z}]")
 trait U[X, Y[_], Z[_, ZZ]] {

tests/warn/scala2-t11681.scala renamed to tests/warn/t11681.scala

@@ -106,4 +106,4 @@ object Answers {
   def answer: Int = 42
 }
 
-val a$1 = 2
+val `a$1` = 2