Python: use concrete iterable source

Author: yoff

python/ql/test/experimental/dataflow/regression/dataflow.expected

@@ -17,8 +17,3 @@
 | test.py:178:9:178:14 | ControlFlowNode for SOURCE | test.py:186:14:186:14 | ControlFlowNode for t |
 | test.py:195:9:195:14 | ControlFlowNode for SOURCE | test.py:197:14:197:14 | ControlFlowNode for t |
 | test.py:195:9:195:14 | ControlFlowNode for SOURCE | test.py:199:14:199:14 | ControlFlowNode for t |
-| test.py:217:15:217:20 | ControlFlowNode for SOURCE | test.py:219:14:219:20 | ControlFlowNode for tainted |
-| test.py:217:15:217:20 | ControlFlowNode for SOURCE | test.py:220:10:220:16 | ControlFlowNode for tainted |
-| test.py:223:15:223:20 | ControlFlowNode for SOURCE | test.py:226:10:226:16 | ControlFlowNode for tainted |
-| test.py:229:15:229:20 | ControlFlowNode for SOURCE | test.py:231:14:231:20 | ControlFlowNode for tainted |
-| test.py:229:15:229:20 | ControlFlowNode for SOURCE | test.py:233:14:233:20 | ControlFlowNode for tainted |

python/ql/test/experimental/dataflow/regression/test.py

@@ -199,10 +199,10 @@ def flow_through_type_test_if_no_class():
         SINK(t)  # ..and here
 
 def flow_in_iteration():
-    t = ITERABLE_SOURCE  # Seems to not be sunk anywhere
+    t = [SOURCE]
     for i in t:
-        SINK(i)
-    SINK(i)
+        SINK(i)  # Flow not found
+    SINK(i)  # Flow not found
 
 def flow_in_generator():
     seq = [SOURCE]