Bug 29050: Added a punctuation between renewal messages

Bug 29050: Added a punctuation between renewal messages

Test plan:

1. First step is to go to administration > then system preferences
2. Set unseenrenewal to "allow"
3. Go to administatrion > circulation and fines rule
4. Set unseenrenewals count to any number
5. Check out an item to a patron and go to the checkouts tab
6. Renew the item
7. Notice that the renewal messages have no seperation
8. Apply the patch
9. Notice there is now a "&" in the spacing between renewal messages

Sponsored-by: Catalyst IT
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 36357ad045116f4be63ea50eff9807f1c262aaef)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit f983ad9b2265826718902ed468c159bc73fd8e36)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>