Fix viewing GitHub submissions (#2268)

(cherry picked from commit 78f7933)

Co-authored-by: Kester <[email protected]>

Author: NicholasMy

lib/archive.rb

@@ -71,7 +71,7 @@ def self.sanitize_directories(files)
 
       # edge case for removing "./" from pathnames
       if file[:pathname].include?("./")
-        file[:pathname] = File.cleanpath(file[:pathname], rel_root = true).gsub("..", "__PARENT__")
+        file[:pathname] = Pathname.new(file[:pathname]).cleanpath.to_s.gsub("..", "__PARENT__")
       end
 
       if(file[:directory])