fix formats

Author: cloudQuant

backtrader/feed.py

@@ -582,11 +582,7 @@ def _tick_nullify(self):
         # PERFORMANCE OPTIMIZATION: Cache tick attribute names to avoid repeated string concat
         tick_cache = getattr(self, "_tick_cache", None)
         if tick_cache is None:
-            tick_cache = [
-                "tick_" + alias
-                for alias in self.getlinealiases()
-                if alias != "datetime"
-            ]
+            tick_cache = ["tick_" + alias for alias in self.getlinealiases() if alias != "datetime"]
             self._tick_cache = tick_cache
 
         for tick_name in tick_cache:

backtrader/linebuffer.py

@@ -650,7 +650,7 @@ def backwards(self, size=1, force=False):
         arr = self.array
         arr_len = len(arr)
         if arr_len > 0:
-            del arr[max(0, arr_len - size):]
+            del arr[max(0, arr_len - size) :]
 
     # Move backward one step (original backwards was overridden)
     def safe_backwards(self, size=1):

backtrader/utils/dateintern.py

@@ -25,9 +25,9 @@
     TIME_MIN: Minimum time value (00:00:00).
 """
 import datetime
-from functools import lru_cache
 import math
 import time as _time
+from functools import lru_cache
 
 import pytz