Enable -Yno-experimental in the compiler

Author: nicolasstucki

compiler/test/dotty/tools/dotc/BootstrappedOnlyCompilationTests.scala

@@ -199,7 +199,7 @@ class BootstrappedOnlyCompilationTests {
     compileDir("tests/plugins/custom/analyzer", withCompilerOptions.and("-Yretain-trees")).checkCompile()
   }
 
-  // tests for experimental featuress ------------------------------------------
+  // tests for experimental features ------------------------------------------
 
   @Test def experimental: Unit =
     implicit val testGroup: TestGroup = TestGroup("experimental")

project/Build.scala

@@ -246,8 +246,7 @@ object Build {
 
     libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % Test,
 
-    // TODO: enable after bootstrap
-    // scalacOptions += "-Yno-experimental",
+    scalacOptions += "-Yno-experimental",
 
     // If someone puts a source file at the root (e.g., for manual testing),
     // don't pick it up as part of any project.
@@ -448,8 +447,7 @@ object Build {
       // Add git-hash used to package the distribution to the manifest to know it in runtime and report it in REPL
       packageOptions += ManifestAttributes(("Git-Hash", VersionUtil.gitHash)),
 
-      // TODO: enable after bootstrap
-      // scalacOptions += "-Yno-experimental",
+      scalacOptions += "-Yno-experimental",
 
       javaOptions ++= {
         val managedSrcDir = {