Added RET keyword

src/core/sheerka/Sheerka.py

@@ -365,6 +365,7 @@ class Sheerka(Concept):
         self.sdp.reset()
         self.locals = {}
 
+    # @profile()
     def evaluate_user_input(self, text: str, user_name="kodjo"):
         """
         Note to KSI: If you try to add execution context to this function,
@@ -676,7 +677,7 @@ class Sheerka(Concept):
                 return self.new(BuiltinConcepts.UNKNOWN_PROPERTY, body=k, concept=concept)
 
         # TODO : add the concept to the list of known concepts (self.instances)
-        concept.metadata.is_evaluated = True
+        concept.metadata.is_evaluated = True # because we have manually set the variables
         return concept
 
     def ret(self, who: str, status: bool, value, message=None, parents=None):