Bug 13836: Does not separate symbol and value if symbol is not displayed.

Bug 13836: Does not separate symbol and value if symbol is not displayed.

This patch force the separation between the symbol and the value to an
empty string if the symbol is not displayed.

Tested with locale de_CH.UTF-8, prove t/Prices.t is now successful.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
(cherry picked from commit 15468615f9c5c427cc819bf833c2df58d13c5080)
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>