Include pre-update node in output

Author: owen-mc

go/ql/test/library-tests/semmle/go/dataflow/PostUpdateNodes/test.expected

@@ -1,15 +1,18 @@
-| test.go:19:2:19:2 | definition of a |
-| test.go:20:11:20:14 | &... |
-| test.go:20:12:20:14 | selection of b |
-| test.go:21:2:21:5 | selection of bs |
-| test.go:21:2:21:8 | index expression |
-| test.go:21:17:21:20 | &... |
-| test.go:21:18:21:20 | struct literal |
-| test.go:22:2:22:5 | selection of bs |
-| test.go:22:2:22:8 | index expression |
-| test.go:22:2:22:13 | implicit dereference |
-| test.go:22:2:22:13 | selection of cptr |
-| test.go:23:2:23:7 | implicit dereference |
-| test.go:23:2:23:7 | selection of bptr |
-| test.go:23:2:23:12 | implicit dereference |
-| test.go:23:2:23:12 | selection of cptr |
+| test.go:19:2:19:2 | definition of a | test.go:20:2:20:2 | a |
+| test.go:19:2:19:2 | definition of a | test.go:21:2:21:2 | a |
+| test.go:19:2:19:2 | definition of a | test.go:22:2:22:2 | a |
+| test.go:19:2:19:2 | definition of a | test.go:23:2:23:2 | a |
+| test.go:20:11:20:14 | &... | test.go:20:11:20:14 | &... |
+| test.go:20:12:20:14 | selection of b | test.go:20:12:20:14 | selection of b |
+| test.go:21:2:21:5 | selection of bs | test.go:21:2:21:5 | selection of bs |
+| test.go:21:2:21:8 | index expression | test.go:21:2:21:8 | index expression |
+| test.go:21:17:21:20 | &... | test.go:21:17:21:20 | &... |
+| test.go:21:18:21:20 | struct literal | test.go:21:18:21:20 | struct literal |
+| test.go:22:2:22:5 | selection of bs | test.go:22:2:22:5 | selection of bs |
+| test.go:22:2:22:8 | index expression | test.go:22:2:22:8 | index expression |
+| test.go:22:2:22:13 | implicit dereference | test.go:22:2:22:13 | implicit dereference |
+| test.go:22:2:22:13 | selection of cptr | test.go:22:2:22:13 | selection of cptr |
+| test.go:23:2:23:7 | implicit dereference | test.go:23:2:23:7 | implicit dereference |
+| test.go:23:2:23:7 | selection of bptr | test.go:23:2:23:7 | selection of bptr |
+| test.go:23:2:23:12 | implicit dereference | test.go:23:2:23:12 | implicit dereference |
+| test.go:23:2:23:12 | selection of cptr | test.go:23:2:23:12 | selection of cptr |

go/ql/test/library-tests/semmle/go/dataflow/PostUpdateNodes/test.ql

@@ -1,4 +1,4 @@
 import go
 
 from DataFlow::PostUpdateNode pun
-select pun
+select pun, pun.getPreUpdateNode()