Bug 7673: QA Followup: trailing whitespace and perlcritic issues

Bug 7673: QA Followup: trailing whitespace and perlcritic issues

This patch fixes the following qa issues:

 FAIL   cataloguing/additem.pl
   FAIL   forbidden patterns
        forbidden pattern: trailing space char (line 833)
   FAIL   critic
        # Variables::ProhibitConditionalDeclarations: Got 2 violation(s).

 FAIL   tools/batchMod.pl
   FAIL   critic
        # Variables::ProhibitConditionalDeclarations: Got 2 violation(s).

Signed-off-by: Koha Team AMU <koha.aixmarseille@gmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>