Update compiler/src/dotty/tools/dotc/typer/RefChecks.scala

Co-authored-by: Sébastien Doeraene <[email protected]>

Author: hamzaremmal

compiler/src/dotty/tools/dotc/typer/RefChecks.scala

@@ -654,9 +654,9 @@ object RefChecks {
 
         val missingMethods = grouped.toList flatMap {
           case (name, syms) =>
-            syms.filterConserve(! _.isSetter)
-            .groupBy(_.signature) // Avoid duplication for similar definitions (#19731)
-            .map(f => f._2.head) // _1: Closest undefined method to the scope
+            syms.filterConserve(!_.isSetter)
+              .groupBy(_.signature) // Avoid duplication for similar definitions (#19731)
+              .map(f => f._2.head) // _1: Closest undefined method to the scope
         }
 
         def stubImplementations: List[String] = {