Add failing tests list in comment

Author: nicolasstucki

compiler/src/dotty/tools/dotc/transform/Inlining.scala

@@ -27,7 +27,6 @@ import dotty.tools.dotc.typer.Inliner
 
 import scala.annotation.constructorOnly
 
-
 class Inlining extends MacroTransform {
   import tpd._
 
@@ -68,3 +67,16 @@ class Inlining extends MacroTransform {
 object Inlining {
   val name: String = "inlining"
 }
+
+// inlined class definition
+// tests/pos/i7068-a.scala failed
+// tests/pos/i7068-b.scala failed
+
+// tulpe xxl: deep subtypes
+// tests/pos/i7580.scala failed
+
+// inlined inline match proxy failing
+// tests/pos/i8892.scala failed
+
+// inlined inline val not pure
+// tests/pos/i8843.scala failed