fixed Windows path format

Author: rrayst

core/src/main/java/com/predic8/util/URIUtil.java

@@ -41,7 +41,7 @@ private static String processDecodedPart(String path) {
         if (path.charAt(0) != '/')
             return path;
         String p = removeLocalhost(removeLeadingSlashes(path));
-        return getPossibleDriveLetter(p).map(driveLetter -> driveLetter + ":" + slashToBackslash(removeDriveLetterAndSlash(p))).orElseGet(() -> "/" + p);
+        return getPossibleDriveLetter(p).map(driveLetter -> driveLetter + ":\\" + slashToBackslash(removeDriveLetterAndSlash(p))).orElseGet(() -> "/" + p);
     }
 
     static String removeDriveLetterAndSlash(String path) {
@@ -75,4 +75,4 @@ private static String stripFilePrefix(String uri) {
             return uri;
         return uri.substring(5); // Remove "file:"
     }
-}
+}