Add filename with spurious +x bit to diag in t/porting/exec-bit.t

This is for the benefit of smoke logs where the "not ok" aren't
shown but the diag() output is.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/porting/exec-bit.t b/t/porting/exec-bit.t
index 7971ed7c27..aa09ac87c2 100644
--- a/t/porting/exec-bit.t
+++ b/t/porting/exec-bit.t
@@ -33,7 +33,7 @@ for my $f ( @manifest ) {
   next unless -x "../$f";
 
   ok( $exe_list{$f}, "tarball will chmod +x $f" )
-    or diag( "Remove the exec bit or add to Porting/exec-bit.txt" );
+    or diag( "Remove the exec bit or add '$f' to Porting/exec-bit.txt" );
 
   delete $exe_list{$f}; # seen it
 }