Fix accidentaly removed .nn call and remove -release from forbidden options

[Cherry-picked 3078860]

Author: rochala

compiler/src/dotty/tools/dotc/interactive/Completion.scala

@@ -250,7 +250,7 @@ object Completion:
   // https://github.com/scalameta/metals/blob/main/mtags/src/main/scala/scala/meta/internal/mtags/KeywordWrapper.scala
   // https://github.com/com-lihaoyi/Ammonite/blob/73a874173cd337f953a3edc9fb8cb96556638fdd/amm/util/src/main/scala/ammonite/util/Model.scala
   private def needsBacktick(s: String) =
-    val chunks = s.split("_", -1)
+    val chunks = s.split("_", -1).nn
 
     val validChunks = chunks.zipWithIndex.forall { case (chunk, index) =>
       chunk.nn.forall(Chars.isIdentifierPart) ||

presentation-compiler/src/main/dotty/tools/pc/ScalaPresentationCompiler.scala

@@ -60,7 +60,7 @@ case class ScalaPresentationCompiler(
   val scalaVersion = BuildInfo.scalaVersion
 
   private val forbiddenOptions = Set("-print-lines", "-print-tasty")
-  private val forbiddenDoubleOptions = Set("-release")
+  private val forbiddenDoubleOptions = Set.empty[String]
 
   given ReportContext =
     folderPath