docs: def set(parser, token):
      """
          Usage:
          {% set templ_tag var1 var2 ... key %}
          {% set variable key %}
          This tag save result of {% templ_tag var1 var2 ... %} to variable with name key,
          Or will save value of variable to new variable with name key.
      """
      bits = token.contents.split(' ')[1:]
      new_token = Token(TOKEN_BLOCK, ' '.join(bits[:-1]))
      if bits[0] in parser.tags:
          func = parser.tags[bits[0]](parser, new_token)
      else:
          func = Variable(bits[0])
      return SetNode(func, bits[-1])