diff --git a/src/black/trans.py b/src/black/trans.py
index 2668d0600f9..cd95155ccd0 100644
--- a/src/black/trans.py
+++ b/src/black/trans.py
@@ -183,7 +183,7 @@ def handle_is_simple_look_up_prev(line: Line, index: int, disallowed: Set[int])
     """
     Handling the determination of is_simple_lookup for the lines prior to the doublestar
     token. This is required because of the need to isolate the chained expression
-    to determine the bracket or parenthesis belong to the single expression.    
+    to determine the bracket or parenthesis belong to the single expression.
     """
     contains_disallowed = False
     chain = []
@@ -207,7 +207,7 @@ def handle_is_simple_lookup_forward(
     """
     Handling decision is_simple_lookup for the lines behind to the doublestar token.
     This function is simplified to keep consistent with the prior logic and the forward
-    case are more straightforward and do not need to care about chained expressions.    
+    case are more straightforward and do not need to care about chained expressions.
     """
     while 0 <= index < len(line.leaves):
         current = line.leaves[index]