Fix minor stylistic errors

freqtrade/vendor/qtpylib/indicators.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # QTPyLib: Quantitative Trading Python Library

tests/exchange/test_ccxt_compat.py

@@ -309,7 +309,7 @@ def exchange(request, exchange_conf):
 
 @pytest.fixture(params=EXCHANGES, scope="class")
 def exchange_futures(request, exchange_conf, class_mocker):
-    if not EXCHANGES[request.param].get('futures') is True:
+    if EXCHANGES[request.param].get('futures') is not True:
         yield None, request.param
     else:
         exchange_conf = set_test_proxy(

tests/strategy/test_interface.py

@@ -214,12 +214,12 @@ def test_ignore_expired_candle(default_conf):
 
     current_time = latest_date + timedelta(seconds=30 + 300)
 
-    assert not strategy.ignore_expired_candle(
+    assert strategy.ignore_expired_candle(
         latest_date=latest_date,
         current_time=current_time,
         timeframe_seconds=300,
         enter=True
-    ) is True
+    ) is not True
 
 
 def test_assert_df_raise(mocker, caplog, ohlcv_history):