Fix building code snippets in markdown files when using scaladoc/generateReferenceDocumentation (crashed)

Author: WojciechMazur

project/Build.scala

@@ -2830,15 +2830,14 @@ object Build {
 
         val languageReferenceConfig = Def.task {
           Scala3.value
-            .add(OutputDir("scaladoc/output/reference"))
+            .add(OutputDir(file("scaladoc/output/reference").getAbsoluteFile.getAbsolutePath))
             .add(SiteRoot(docs.getAbsolutePath))
             .add(ProjectName("Scala 3 Reference"))
             .add(ProjectVersion(baseVersion))
             .remove[VersionsDictionaryUrl]
             .add(SourceLinks(List(
               s"${docs.getParentFile().getAbsolutePath}=github://scala/scala3/language-reference-stable"
             )))
-            .withTargets(List("___fake___.scala"))
         }
 
         val expectedLinksRegeneration = Def.task {

scaladoc/src/dotty/tools/scaladoc/Scaladoc.scala

@@ -131,7 +131,7 @@ object Scaladoc:
       roots.split(File.pathSeparatorChar).toList.map(new File(_))
 
     argumentFilesOrNone.fold((None, newContext)) { argumentFiles =>
-      val inFiles = argumentFiles.map(File(_)).filter(_.getName != "___fake___.scala")
+      val inFiles = argumentFiles.map(File(_))
       val (existing, nonExisting) = inFiles.partition(_.exists)
 
       if nonExisting.nonEmpty then report.warning(