CFG: Workaround in test output for source/sink pairs with multiple edges

Author: hvitved

csharp/ql/lib/semmle/code/csharp/controlflow/internal/ControlFlowGraphImplShared.qll

@@ -907,9 +907,13 @@ module TestOutput {
 
   query predicate edges(RelevantNode pred, RelevantNode succ, string attr, string val) {
     attr = "semmle.label" and
-    exists(SuccessorType t | succ = getASuccessor(pred, t) |
-      if successorTypeIsSimple(t) then val = "" else val = t.toString()
-    )
+    val =
+      strictconcat(SuccessorType t, string s |
+        succ = getASuccessor(pred, t) and
+        if successorTypeIsSimple(t) then s = "" else s = t.toString()
+      |
+        s, ", " order by s
+      )
     or
     attr = "semmle.order" and
     val =

csharp/ql/test/library-tests/controlflow/graph/NodeGraph.expected

@@ -2775,7 +2775,7 @@ Assert.cs:
 #-----| true -> access to parameter b2
 
 #  140| [assertion failure] access to parameter b2
-#-----| false -> [assertion failure] access to parameter b3
+#-----| false, true -> [assertion failure] access to parameter b3
 
 #  140| access to parameter b2
 #-----| false -> [assertion success] access to parameter b3
@@ -4924,7 +4924,7 @@ ExitMethods.cs:
 #-----|  -> ...;
 
 #   22| call to method ErrorAlways
-#-----| exception(Exception) -> exit M3 (abnormal)
+#-----| exception(ArgumentException), exception(Exception) -> exit M3 (abnormal)
 
 #   22| ...;
 #-----|  -> true