Added keyword c:xxx: to express that we want the concept, not its body

tests/test_PythonParser.py

@@ -55,3 +55,15 @@ def test_i_can_detect_error():
     assert isinstance(res.value, ParserResultConcept)
     assert isinstance(res.value.value[0], PythonErrorNode)
     assert isinstance(res.value.value[0].exception, SyntaxError)
+
+
+def test_i_can_parse_a_concept():
+    text = "c:concept_name: + 1"
+
+    parser = PythonParser()
+    res = parser.parse(get_context(), text)
+
+    assert res
+    assert res.value.value == PythonNode(
+        "c:concept_name: + 1",
+        ast.parse("__C__concept_name__C__+1", mode="eval"))