code: def _set_filename(title, pelican_path):
          
          # cleaning the special char
          name = title.replace('/', '_').replace('\\', '_').\
              replace(' ', '_').replace(':', '_').replace('&', '').\
              replace('?', '').replace('!', '')
  
          return "{}/{}.html".format(pelican_path, name)
docs: build the filename
              :param title: the title of the post
              :param pelican_path: where the files are created
              :type title: string
              :type pelican_path: string
              :return: the filename
              :rtype: string