scaladoc should take -Werror/-Xfatal-warnings into account

Author: mkurz

compiler/src/dotty/tools/dotc/config/ScalaSettings.scala

@@ -110,6 +110,7 @@ trait CommonScalaSettings:
 
   val javaOutputVersion: Setting[String] = ChoiceSetting("-java-output-version", "version", "Compile code with classes specific to the given version of the Java platform available on the classpath and emit bytecode for this version. Corresponds to -release flag in javac.", ScalaSettings.supportedReleaseVersions, "", aliases = List("-release", "--release"))
 
+  val XfatalWarnings: Setting[Boolean] = BooleanSetting("-Werror", "Fail the compilation if there are any warnings.", aliases = List("-Xfatal-warnings"))
   val deprecation: Setting[Boolean] = BooleanSetting("-deprecation", "Emit warning and location for usages of deprecated APIs.", aliases = List("--deprecation"))
   val feature: Setting[Boolean] = BooleanSetting("-feature", "Emit warning and location for usages of features that should be imported explicitly.", aliases = List("--feature"))
   val explain: Setting[Boolean] = BooleanSetting("-explain", "Explain errors in more detail.", aliases = List("--explain"))
@@ -158,7 +159,6 @@ private sealed trait WarningSettings:
   import Setting.ChoiceWithHelp
 
   val Whelp: Setting[Boolean] = BooleanSetting("-W", "Print a synopsis of warning options.")
-  val XfatalWarnings: Setting[Boolean] = BooleanSetting("-Werror", "Fail the compilation if there are any warnings.", aliases = List("-Xfatal-warnings"))
   val WvalueDiscard: Setting[Boolean] = BooleanSetting("-Wvalue-discard", "Warn when non-Unit expression results are unused.")
   val WNonUnitStatement = BooleanSetting("-Wnonunit-statement", "Warn when block statements are non-Unit expressions.")