preproc.i: Also note URL for "// in macro" PR
diff --git a/Examples/test-suite/preproc.i b/Examples/test-suite/preproc.i
index f666911..3239798 100644
--- a/Examples/test-suite/preproc.i
+++ b/Examples/test-suite/preproc.i
@@ -373,7 +373,8 @@
int methodX(int x) { return x+100; }
%}
-// Comma in macro - Github issue #974
+// Comma in macro - https://github.com/swig/swig/issues/974 (for /* */)
+// and https://github.com/swig/swig/pull/1166 (for //)
%inline %{
#define swig__attribute__(x)
#define TCX_PACKED(d) d swig__attribute__ ((__packed__))
