not about a filetest, which now have their own warning.
p4raw-id: //depot/perl@6520
=item stat() on unopened filehandle %s
-(W unopened) You tried to use the stat() function (or an equivalent file
-test) on a filehandle that was either never opened or has since been
-closed.
+(W unopened) You tried to use the stat() function on a filehandle that
+was either never opened or has since been closed.
=item Strange *+?{} on zero-length expression