Python: Accept .expected for typetracking-summaries

Author: RasmusWL

python/ql/test/experimental/dataflow/typetracking-summaries/summaries.py

@@ -41,8 +41,8 @@ def explicit_identity(x):
 tms  # $ MISSING: tracked
 
 another_tainted_list = TTS_append_to_list([], tracked)  # $ tracked
-atl = another_tainted_list[0]
-atl  # $ MISSING: tracked
+atl = another_tainted_list[0] # $ tracked
+atl  # $ tracked
 
 # This will not work, as the call is not found by `getACallSimple`.
 from json import loads as json_loads