Syntax highlighting for JSON snippets in the manual has been lost.
For example, compare the examples on these pages:

• https://web.archive.org/web/20171105002926/https://www.zabbix.com/documentation/3.0/manual/api/reference/trigger/get
• https://www.zabbix.com/documentation/3.0/manual/api/reference/trigger/get

Or search for "Japan" here:

• https://web.archive.org/web/20170713001124/https://www.zabbix.com/documentation/3.0/manual/discovery/low_level_discovery
• https://www.zabbix.com/documentation/3.0/manual/discovery/low_level_discovery