Bug 8581: don't display parentheses when we don't have a type
Prior to this patch, see also references in certain authority records
(most notably GND records) were being followed by empty parentheses in
the search results display. This patch resolves that problem.
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz> Signed-off-by: Paul Poulain <paul.poulain@biblibre.com> Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com> Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>