Python: dataflow regression tests: fix source2

Author: RasmusWL

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

@@ -10,10 +10,10 @@
 | test.py:76:9:76:14 | ControlFlowNode for SOURCE | test.py:78:10:78:10 | ControlFlowNode for t |
 | test.py:128:13:128:18 | ControlFlowNode for SOURCE | test.py:132:14:132:14 | ControlFlowNode for t |
 | test.py:159:10:159:15 | ControlFlowNode for SOURCE | test.py:160:14:160:14 | ControlFlowNode for t |
-| test.py:163:9:163:14 | ControlFlowNode for SOURCE | test.py:165:10:165:10 | ControlFlowNode for s |
+| test.py:163:9:163:14 | ControlFlowNode for SOURCE | test.py:165:12:165:12 | ControlFlowNode for s |
 | test.py:178:9:178:14 | ControlFlowNode for SOURCE | test.py:180:14:180:14 | ControlFlowNode for t |
-| test.py:178:9:178:14 | ControlFlowNode for SOURCE | test.py:182:14:182:14 | ControlFlowNode for t |
-| test.py:178:9:178:14 | ControlFlowNode for SOURCE | test.py:184:14:184:14 | ControlFlowNode for t |
+| test.py:178:9:178:14 | ControlFlowNode for SOURCE | test.py:182:16:182:16 | ControlFlowNode for t |
+| test.py:178:9:178:14 | ControlFlowNode for SOURCE | test.py:184:16:184:16 | ControlFlowNode for t |
 | 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 |

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

@@ -40,8 +40,8 @@ def test7(cond):
     if cond:
         SINK(t)
 
-def source2(arg):
-    return source(arg)
+def source2():
+    return source()
 
 def sink2(arg):
     sink(arg)
@@ -50,7 +50,7 @@ def sink3(cond, arg):
     if cond:
         sink(arg)
 
-def test8(cond):  # This flow is shadowed by previous tests, perhaps do a path query
+def test8(cond):
     t = source2()
     sink2(t)