C#: Adjust test output.

Author: aschackmull

csharp/ql/test/library-tests/dataflow/external-models/ExternalFlow.expected

@@ -45,6 +45,9 @@ edges
 | ExternalFlow.cs:91:30:91:30 | SSA def(i) : Int32 | ExternalFlow.cs:92:18:92:18 | (...) ... |
 | ExternalFlow.cs:121:46:121:46 | s : Object | ExternalFlow.cs:60:35:60:35 | o : Object |
 | ExternalFlow.cs:123:34:123:41 | elements [element] : Object | ExternalFlow.cs:72:23:72:23 | o : Object |
+| ExternalFlow.cs:123:34:123:41 | elements [element] : Object | ExternalFlow.cs:72:23:72:23 | o : Object |
+| ExternalFlow.cs:123:34:123:41 | elements [element] : Object | ExternalFlow.cs:123:34:123:41 | elements [element] : Object |
+| ExternalFlow.cs:123:34:123:41 | elements [element] : Object | ExternalFlow.cs:123:34:123:41 | elements [element] : Object |
 nodes
 | ExternalFlow.cs:9:27:9:38 | object creation of type Object : Object | semmle.label | object creation of type Object : Object |
 | ExternalFlow.cs:10:18:10:33 | call to method StepArgRes | semmle.label | call to method StepArgRes |
@@ -106,6 +109,7 @@ nodes
 | ExternalFlow.cs:92:18:92:18 | (...) ... | semmle.label | (...) ... |
 | ExternalFlow.cs:121:46:121:46 | s : Object | semmle.label | s : Object |
 | ExternalFlow.cs:123:34:123:41 | elements [element] : Object | semmle.label | elements [element] : Object |
+| ExternalFlow.cs:123:34:123:41 | elements [element] : Object | semmle.label | elements [element] : Object |
 subpaths
 invalidModelRow
 #select