refactor: Lint

HepLean/StandardModel/HiggsBoson/Potential.lean

@@ -5,7 +5,7 @@ Authors: Joseph Tooby-Smith
 -/
 import Mathlib.Algebra.QuadraticDiscriminant
 import HepLean.StandardModel.HiggsBoson.PointwiseInnerProd
-import HepLean.Meta.InformalDef
+import HepLean.Meta.Informal
 /-!
 # The potential of the Higgs field
 
@@ -316,9 +316,9 @@ lemma isBounded_of_𝓵_pos (h : 0 < P.𝓵) : P.IsBounded := by
   linarith
 
 informal_lemma isBounded_iff_of_𝓵_zero where
-  physics := "When there is no quartic coupling, the potential is bounded iff the mass squared is
+  physics :≈ "When there is no quartic coupling, the potential is bounded iff the mass squared is
     non-positive."
-  math := "For `P : Potential` then P.IsBounded if and only if P.μ2 ≤ 0.
+  math :≈ "For `P : Potential` then P.IsBounded if and only if P.μ2 ≤ 0.
     That is to say `- P.μ2 * ‖φ‖_H ^ 2 x` is bounded below if and only if `P.μ2 ≤ 0`."
 
 /-!