Fix indent

Mathlib/Order/Filter/Ker.lean

@@ -42,9 +42,9 @@ lemma ker_surjective : Surjective (ker : Filter α → Set α) := gi_principal_k
 @[simp] lemma ker_eq_univ : ker f = univ ↔ f = ⊤ := gi_principal_ker.gc.u_eq_top.trans <| by simp
 @[simp] lemma ker_inf (f g : Filter α) : ker (f ⊓ g) = ker f ∩ ker g := gi_principal_ker.gc.u_inf
 @[simp] lemma ker_iInf (f : ι → Filter α) : ker (⨅ i, f i) = ⨅ i, ker (f i) :=
-gi_principal_ker.gc.u_iInf
+  gi_principal_ker.gc.u_iInf
 @[simp] lemma ker_sInf (S : Set (Filter α)) : ker (sInf S) = ⨅ f ∈ S, ker f :=
-gi_principal_ker.gc.u_sInf
+  gi_principal_ker.gc.u_sInf
 @[simp] lemma ker_principal (s : Set α) : ker (𝓟 s) = s := gi_principal_ker.u_l_eq _
 
 @[simp] lemma ker_pure (a : α) : ker (pure a) = {a} := by rw [← principal_singleton, ker_principal]