diff --git a/lib/iris/coords.py b/lib/iris/coords.py
index 2c8b3a3100..82e75c0629 100644
--- a/lib/iris/coords.py
+++ b/lib/iris/coords.py
@@ -1213,8 +1213,7 @@ def serialize(x):
 
             # Determine the right array method for stacking
             stack_method = da.stack if self.has_bounds() \
-                                       and is_lazy_data(self.core_bounds()) \
-                else np.stack
+                and is_lazy_data(self.core_bounds()) else np.stack
 
             item = stack_method(self.core_bounds()) if self.has_bounds() \
                 else self.core_points()