Fixed RET functionnality misbehaviour

_concepts_lite.txt

@@ -0,0 +1,5 @@
+def concept one as 1
+def concept two as 2
+def concept plus from a plus b as a + b
+def concept explain as get_results() | filter("id == 0") | recurse(2)
+def concept explain last as get_last_results() | filter("id == 0") | recurse(2)