Fixes demo example

_fc-plugins/acsl-importer.md

@@ -75,6 +75,13 @@ void job ( int *t , int A) {
 and a specification file:
 
 ```
+module demo :
+ axiomatic A {
+ type event = B | C(integer);
+ predicate P(integer x);
+ logic integer phi(event e);
+ }
+ 
 function f:
   contract:
     ensures P(phi(C(\result)));