def del(path, raise = true)
      path = '"' + path + '"' if path.include? ' '
      exec 'del ' + path
      true
    rescue Client::RuntimeError => e
      raise e if raise
      false
    end
def del(path, raise = true)
      path = '"' + path + '"' if path.include? ' '
      exec 'del ' + path
      true
    rescue Client::RuntimeError => e
      raise e if raise
      false
    end
Delete a remote file
 @param [String] path The remote file to be deleted
 @param [Boolean] raise raise raise Error or just return +false+
 @return [Boolean] true on success