Fixed minor issues and enhancements

tests/parsers/test_AtomsParser.py

@@ -193,6 +193,20 @@ class TestAtomsParser(TestUsingMemoryBasedSheerka):
             assert sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
             assert lexer_nodes == expected_array
 
+    def test_i_can_parse_concepts_with_isa(self):
+        concepts_map = {
+            "one": Concept("one"),
+            "number": Concept("number"),
+        }
+
+        sheerka, context, parser = self.init_parser(concepts_map)
+        sheerka.set_isa(context, sheerka.new("one"), sheerka.new("number"))
+
+        res = parser.parse(context, "one")
+        lexer_nodes = res.body.body
+        expected_array = compute_expected_array(concepts_map, "one", ["one"])
+        assert lexer_nodes == expected_array
+
     @pytest.mark.parametrize("text", [
         "foo",
         f"foo one",