ruby.rb

      if not before.nil?                                                                  
        # Insert before given path                                                        
        aug.insert(before, "path", true)                                                  
        entry_path = "#{fpath}/path[count(*)=0]"                                          
      elsif not after.nil?                                                                
        # Insert after given path                                                         
        aug.insert(after, "path", false)                                                  
        entry_path = "#{fpath}/path[count(*)=0]"                                          
      end