updated for version 7.3.761
Problem:    In Visual mode a "-p does not work. (Marcin Szamotulski)
Solution:   Avoid writing to "- before putting it. (Christian Brabandt)
diff --git a/src/testdir/test48.ok b/src/testdir/test48.ok
index 4fcbe50..334cb5a 100644
--- a/src/testdir/test48.ok
+++ b/src/testdir/test48.ok
@@ -1,3 +1,4 @@
+, foo
 keyword keyword
 all your base 
 are belong to vim