diff --git a/day05.py b/day05.py
index 750915d..fbf9343 100644
--- a/day05.py
+++ b/day05.py
@@ -16,7 +16,11 @@ def parse_map(input):
 def transform_ranges(map, ranges):
     for start, length in ranges:
         # find the start of the range
-        (dst_start, src_start, len) = next((dst, src, len) for (dst, src, len) in map if src <= start < (src + len))
+        (dst_start, src_start, len) = next(
+            (dst, src, len)
+            for (dst, src, len) in map
+            if src <= start < (src + len)
+        )
 
         end = start + length
         src_end = src_start + len