diff --git a/thue-morse.v b/thue-morse.v
index bc6ccc6..d82db4a 100644
--- a/thue-morse.v
+++ b/thue-morse.v
@@ -746,7 +746,6 @@ Proof.
   apply Nat.lt_trans.
   rewrite tm_size_power2. assumption.
 
-
   rewrite Nat.mul_sub_distr_l. rewrite Nat.mul_1_r.
   rewrite <- Nat.sub_succ_l. 
   rewrite Nat.sub_succ. reflexivity.