[Koha-bugs] [Bug 14287] Preserve valid ISBN-13 identifiers if they start with something else than 978

[bugzilla-daemon at bugs.koha-community.org]

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=14287

--- Comment #1 from Olli-Antti Kivilahti <olli-antti.kivilahti at jns.fi> ---
Created attachment 39625
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http://bugs.koha-community.org/bugzilla3/attachment.cgi?id=39625&action=edit
Bug 14287 - Preserve valid ISBN-13 identifiers if they start with something
else than 978

If Business::ISBN cannot make an ISBN-10 out of a valid ISBN-13 starting with
979, then we should preserve the ISBN-13 instead of getting rid of it.
ISBN-13 starting with 979 is valid as well and in a few years starting with 980
might be as well as the ISBN supply is running out.

This patch modifies the C4::Koha::NormalizeISBN() to preserve the original ISBN
if type conversion fails.

Use Buug 13167's TEST PLAN.

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