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-rw-r--r--Master/tlpkg/tlperl/lib/URI/urn/isbn.pm7
1 files changed, 4 insertions, 3 deletions
diff --git a/Master/tlpkg/tlperl/lib/URI/urn/isbn.pm b/Master/tlpkg/tlperl/lib/URI/urn/isbn.pm
index 0da931bfb69..b335044b885 100644
--- a/Master/tlpkg/tlperl/lib/URI/urn/isbn.pm
+++ b/Master/tlpkg/tlperl/lib/URI/urn/isbn.pm
@@ -1,9 +1,10 @@
package URI::urn::isbn; # RFC 3187
-require URI::urn;
-@ISA=qw(URI::urn);
-
use strict;
+use warnings;
+
+use parent 'URI::urn';
+
use Carp qw(carp);
BEGIN {