git commit -m "style(Combinatorics/Enumerative):

 fix trailing whitespace and final newline"

Author: BeibeiX0

Mathlib/Combinatorics/Enumerative/PentagonalNumbers.lean

@@ -263,4 +263,4 @@ lemma coeff_E_eq_coeff_cutoff (n : ℕ) :
     (PowerSeries.coeff n) (E n) =
       (PowerSeries.coeff n)
         (∏ k ∈ Finset.range (n + 1), (1 - (PowerSeries.X : PowerSeries ℤ) ^ (k + 1))) := by
-  simp [E]
+  rfl