"Not" is no longer a definition

From: sacerdot <sacerdot@c2b2084f-9a08-0410-b176-e24b037a169a>

diff --git a/helm/software/matita/nlibrary/datatypes/list.ma b/helm/software/matita/nlibrary/datatypes/list.ma
index 0e13377257e180b4a8505741618bd76ed7b86216..4188bb2883c3a625213268f10a989d86f99a555a 100644 (file)
--- a/helm/software/matita/nlibrary/datatypes/list.ma
+++ b/helm/software/matita/nlibrary/datatypes/list.ma
@@ -35,7 +35,7 @@ interpretation "cons" 'cons hd tl = (cons ? hd tl).
 
 ntheorem nil_cons:
   ∀A:Type[0].∀l:list A.∀a:A. a::l ≠ [].
-#A;#l;#a;#H;ndestruct;
+#A;#l;#a; @; #H; ndestruct;
 nqed.
 
 nlet rec id_list A (l: list A) on l ≝