Single quote is shown as error on templated discovery and discovery items.  Seen in the info column of items configuration.  Similar to ZBX-17806.

Steps to reproduce:

1. Create new template
2. Create new discovery
3. Create new discovery item
4. Assign template to host

Additional Notes:

• I'm using a custom user parameter that executes a shell script for discovery.
• UserParameter=test.client.discovery,/etc/zabbix/scripts/test.sh discover
• Attaching test.sh
• My discovery items are "Zabbix Trapper".  Does not poll, yet still has same error.

Result:
See screenshot...