Mark notation as "only printing"

Unfortunately, we currently have to keep the unicode-space hack in some places because Coq still complains about the notation otherwise

theories/proofmode/notation.v

@@ -7,22 +7,22 @@ Arguments Envs _ _%proof_scope _%proof_scope.
 Arguments Enil {_}.
 Arguments Esnoc {_} _%proof_scope _%string _%uPred_scope.
 
-Notation "​" := Enil (format "​") : proof_scope.
-Notation "Γ ​ H : P" := (Esnoc Γ H P)
+Notation "​" := Enil (format "​", only printing) : proof_scope.
+Notation "Γ H : P" := (Esnoc Γ H P)
   (at level 1, P at level 200,
-   left associativity, format "Γ ​ H  :  P '//'") : proof_scope.
+   left associativity, format "Γ H  :  P '//'", only printing) : proof_scope.
 Notation "Γ '--------------------------------------' □ Δ '--------------------------------------' ∗ Q" :=
   (of_envs (Envs Γ Δ) ⊢ Q%I)
   (at level 1, Q at level 200, left associativity,
-  format "Γ '--------------------------------------' □ '//' Δ '--------------------------------------' ∗ '//' Q '//'") :
+  format "Γ '--------------------------------------' □ '//' Δ '--------------------------------------' ∗ '//' Q '//'", only printing) :
   C_scope.
 Notation "Δ '--------------------------------------' ∗ Q" :=
   (of_envs (Envs Enil Δ) ⊢ Q%I)
   (at level 1, Q at level 200, left associativity,
-  format "Δ '--------------------------------------' ∗ '//' Q '//'") : C_scope.
+  format "Δ '--------------------------------------' ∗ '//' Q '//'", only printing) : C_scope.
 Notation "Γ '--------------------------------------' □ Q" :=
   (of_envs (Envs Γ Enil) ⊢ Q%I)
   (at level 1, Q at level 200, left associativity,
-  format "Γ '--------------------------------------' □ '//' Q '//'")  : C_scope.
+  format "Γ '--------------------------------------' □ '//' Q '//'", only printing)  : C_scope.
 Notation "​​ Q" := (of_envs (Envs Enil Enil) ⊢ Q%I)
-  (at level 1, Q at level 200, format "​​ Q") : C_scope.
+  (at level 1, Q at level 200, format "​​ Q", only printing) : C_scope.