better pathSeparator string

Author: Martijn Hoekstra

project/Build.scala

@@ -453,7 +453,7 @@ object Build {
   def findLib(attList: Seq[Attributed[File]], name: String) = attList
     .map(_.data.getAbsolutePath)
     .find(_.contains(name))
-    .toList.mkString(java.io.File.pathSeparatorChar.toString)
+    .toList.mkString(java.io.File.pathSeparator)
 
   // Settings shared between dotty-compiler and dotty-compiler-bootstrapped
   lazy val commonDottyCompilerSettings = Seq(