fix(CategoryTheory/MorphismProperty/Limits): change duplicate lemma (leanprover-community#39647)

Two lemmas introduced in leanprover-community#39534 do not have the right content and repeat previous lemmas. This PR fixes them to make them prove what their name claim.

Author: robin-carlier

Mathlib/CategoryTheory/MorphismProperty/Limits.lean

@@ -1012,10 +1012,10 @@ instance (P : MorphismProperty C) [P.HasPullbacks] (P' : MorphismProperty C) :
 
 lemma hasPullbacksAgainst_top_iff
     (P : MorphismProperty C) :
-    P.IsStableUnderBaseChangeAgainst ⊤ ↔ P.IsStableUnderBaseChange where
+    P.HasPullbacksAgainst ⊤ ↔ P.HasPullbacks where
   mp h :=
-    ⟨fun {_ _ _ _} _ _ _ _ h' h'' ↦
-      (h.isStableUnderBaseChangeAlong _ (by tauto)).of_isPullback h' h''⟩
+    ⟨fun _ h' ↦
+      (h.hasPullbacksAlong _ (by tauto)).hasPullback _ h'⟩
   mpr _ := inferInstance
 
 lemma _root_.CategoryTheory.Limits.hasPullback_ofHasPullbacksAgainst
@@ -1027,7 +1027,7 @@ lemma _root_.CategoryTheory.Limits.hasPullback_ofHasPullbacksAgainst
   MorphismProperty.HasPullbacksAlong.hasPullback f hf
 
 /-- `P.IsStableUnderCobaseChangeAgainst P'` states that for any morphism `f` satisfying `P` and
-any morphism `g` with the same codomain as `f` satisfying `P'`, any pullback of `f` along `g`
+any morphism `g` with the same domain as `f` satisfying `P'`, any pushout of `f` along `g`
 also satisfies `P`. -/
 class IsStableUnderCobaseChangeAgainst
     (P P' : MorphismProperty C) : Prop where
@@ -1047,7 +1047,7 @@ lemma isStableUnderCobaseChangeAgainst_top_iff
       (h.isStableUnderCobaseChangeAlong _ (by tauto)).of_isPushout h' h''⟩
   mpr _ := inferInstance
 
-/-- `P.HasPullbacksAgainst P'` states that for any morphism `f` satisfying `P'`,
+/-- `P.HasPushoutsAgainst P'` states that for any morphism `f` satisfying `P'`,
 `P` has pushouts along `f`. -/
 class HasPushoutsAgainst
     (P P' : MorphismProperty C) : Prop where
@@ -1060,10 +1060,10 @@ instance (P : MorphismProperty C) [P.HasPushouts] (P' : MorphismProperty C) :
 
 lemma hasPushoutsAgainst_top_iff
     (P : MorphismProperty C) :
-    P.IsStableUnderCobaseChangeAgainst ⊤ ↔ P.IsStableUnderCobaseChange where
+    P.HasPushoutsAgainst ⊤ ↔ P.HasPushouts where
   mp h :=
-    ⟨fun {_ _ _ _} _ _ _ _ h' h'' ↦
-      (h.isStableUnderCobaseChangeAlong _ (by tauto)).of_isPushout h' h''⟩
+    ⟨fun _ h' ↦
+      (h.hasPushoutsAlong _ (by tauto)).hasPushout _ h'⟩
   mpr _ := inferInstance
 
 lemma _root_.CategoryTheory.Limits.hasPushout_ofHasPushoutsAgainst