diff --git a/docs/cooling/plot_lambda.py b/docs/cooling/plot_lambda.py
index 1f9f6b74..46ec18f7 100644
--- a/docs/cooling/plot_lambda.py
+++ b/docs/cooling/plot_lambda.py
@@ -31,10 +31,8 @@
         gs_LambdaZem2,
         gs_LambdaZem1,
         gs_LambdaZ1,
-        gs_LambdaZ2
-    ) = (
-        np.loadtxt("gnat_sternberg_cie_table.txt", unpack=True, skiprows=23)
-    )
+        gs_LambdaZ2,
+    ) = (np.loadtxt("gnat_sternberg_cie_table.txt", unpack=True, skiprows=23))
     # NOTE: There is not enough information in this table alone to compute n_e!
     #  (The electron fraction must be computed from datafile2a.txt)