Python: Add toString to TurboGears HttpResponseTaintSinks

Naming these were a bit hard, but better than generic "Taint Sink"

Author: RasmusWL

python/ql/src/semmle/python/web/turbogears/Response.qll

@@ -5,6 +5,8 @@ import semmle.python.web.Http
 import TurboGears
 
 class ControllerMethodReturnValue extends HttpResponseTaintSink {
+    override string toString() { result = "TurboGears ControllerMethodReturnValue" }
+
     ControllerMethodReturnValue() {
         exists(TurboGearsControllerMethod m |
             m.getAReturnValueFlowNode() = this and
@@ -16,6 +18,8 @@ class ControllerMethodReturnValue extends HttpResponseTaintSink {
 }
 
 class ControllerMethodTemplatedReturnValue extends HttpResponseTaintSink {
+    override string toString() { result = "TurboGears ControllerMethodTemplatedReturnValue" }
+
     ControllerMethodTemplatedReturnValue() {
         exists(TurboGearsControllerMethod m |
             m.getAReturnValueFlowNode() = this and

python/ql/test/library-tests/web/turbogears/HttpSinks.expected

@@ -1,6 +1,5 @@
-| test.py:8:16:8:69 | Taint sink | externally controlled string |
-| test.py:14:16:14:50 | Taint sink | externally controlled string |
-| test.py:19:16:19:50 | Taint sink | externally controlled string |
-| test.py:23:16:23:50 | Taint sink | externally controlled string |
-| test.py:27:16:27:38 | Taint sink | {externally controlled string} |
-FIXME
+| test.py:8:16:8:69 | TurboGears ControllerMethodReturnValue | externally controlled string |
+| test.py:14:16:14:50 | TurboGears ControllerMethodReturnValue | externally controlled string |
+| test.py:19:16:19:50 | TurboGears ControllerMethodReturnValue | externally controlled string |
+| test.py:23:16:23:50 | TurboGears ControllerMethodReturnValue | externally controlled string |
+| test.py:27:16:27:38 | TurboGears ControllerMethodTemplatedReturnValue | {externally controlled string} |