fix docs

binance/streams.py

@@ -1000,10 +1000,12 @@ def individual_symbol_ticker_futures_socket(self, symbol: str, futures_type: Fut
     def all_ticker_futures_socket(self, channel: str = '!bookTicker', futures_type: FuturesType = FuturesType.USD_M):
         """Start a websocket for all ticker data
         By default all markets are included in an array.
+
         https://binance-docs.github.io/apidocs/futures/en/#all-book-tickers-stream
         https://binance-docs.github.io/apidocs/futures/en/#all-market-tickers-streams
+
         :param channel: optional channel type, default '!bookTicker', but '!ticker@arr' is also available
-        :param futures_type: use USD-M or COIN-M futures default USD-M
+        :param: futures_type: use USD-M or COIN-M futures default USD-M
         :returns: connection key string if successful, False otherwise
         Message Format
         .. code-block:: python