Path fix for doc-tool and QuoteDriver

In QuoteDriver, previous we have path like the following on windows:

/C:/Users/dotty/My%20Programs/Java/Test/bin/myJar.jar

Credit: https://stackoverflow.com/questions/6164448/convert-url-to-normal-windows-filename-java

Author: liufengyun

compiler/src/dotty/tools/dotc/quoted/QuoteDriver.scala

@@ -96,7 +96,8 @@ object QuoteDriver {
       case cl: URLClassLoader =>
         // Loads the classes loaded by this class loader
         // When executing `run` or `test` in sbt the classpath is not in the property java.class.path
-        val newClasspath = cl.getURLs.map(_.getFile())
+        import java.nio.file.Paths
+        val newClasspath = cl.getURLs.map(url => Paths.get(url.toURI).toFile)
         newClasspath.mkString("", java.io.File.pathSeparator, if (classpath0 == "") "" else java.io.File.pathSeparator + classpath0)
       case _ => classpath0
     }

doc-tool/src/dotty/tools/dottydoc/staticsite/Site.scala

@@ -167,9 +167,9 @@ case class Site(
   private def defaultParams(pageLocation: JFile, additionalDepth: Int = 0): DefaultParams = {
     val pathFromRoot = stripRoot(pageLocation)
     val baseUrl: String = {
-      val rootLen = root.getAbsolutePath.split(sep).length
-      val assetLen = pageLocation.getAbsolutePath.split(sep).length
-      "../" * (assetLen - rootLen - 1 + additionalDepth) + "."
+      val rootLen = root.toPath.normalize.getNameCount
+      val assetLen = pageLocation.toPath.normalize.getNameCount
+      "../" * (assetLen - rootLen + additionalDepth) + "."
     }
 
     DefaultParams(
@@ -203,7 +203,7 @@ case class Site(
 
         val path = if (scala.util.Properties.isWin)
           e.path.map(_.replace("<", "_").replace(">", "_"))
-        else 
+        else
           e.path
         val target = mkdirs(fs.getPath(outDir.getAbsolutePath +  sep + "api" + sep + path.mkString(sep) + suffix))
         val params = defaultParams(target.toFile, -1).withPosts(blogInfo).withEntity(Some(e)).toMap