C#: Improve alert message for RedundantToStringCall.ql

Author: hvitved

csharp/ql/src/Useless code/RedundantToStringCall.ql

@@ -20,4 +20,4 @@ where
   mc instanceof ImplicitToStringExpr and
   mc.getTarget() instanceof ToStringMethod and
   not mc.getQualifier() instanceof BaseAccess
-select mc, "Redundant call to 'ToString' on a String object."
+select mc, "Redundant call to 'ToString'."

csharp/ql/test/query-tests/Useless Code/RedundantToStringCall/RedundantToStringCall.expected

@@ -1,5 +1,5 @@
-| RedundantToStringCall.cs:8:27:8:38 | call to method ToString | Redundant call to 'ToString' on a String object. |
-| RedundantToStringCall.cs:11:37:11:48 | call to method ToString | Redundant call to 'ToString' on a String object. |
-| RedundantToStringCall.cs:14:39:14:50 | call to method ToString | Redundant call to 'ToString' on a String object. |
-| RedundantToStringCall.cs:18:19:18:30 | call to method ToString | Redundant call to 'ToString' on a String object. |
-| RedundantToStringCallBad.cs:7:45:7:56 | call to method ToString | Redundant call to 'ToString' on a String object. |
+| RedundantToStringCall.cs:8:27:8:38 | call to method ToString | Redundant call to 'ToString'. |
+| RedundantToStringCall.cs:11:37:11:48 | call to method ToString | Redundant call to 'ToString'. |
+| RedundantToStringCall.cs:14:39:14:50 | call to method ToString | Redundant call to 'ToString'. |
+| RedundantToStringCall.cs:18:19:18:30 | call to method ToString | Redundant call to 'ToString'. |
+| RedundantToStringCallBad.cs:7:45:7:56 | call to method ToString | Redundant call to 'ToString'. |