What is the complete character escape map for date math index names in URI?

I'm working on a PHP client fix for escaping some URI characters in index names with date math (ruflin/elastica)

I would like to know if this character escape map is complete:


In the example below, I can see the comma , was escaped as well, but is not present in the character escape map.
Should it be included?

# GET /<logstash-{now/d-2d}>,<logstash-{now/d-1d}>,<logstash-{now/d}>/_search
GET /%3Clogstash-%7Bnow%2Fd-2d%7D%3E%2C%3Clogstash-%7Bnow%2Fd-1d%7D%3E%2C%3Clogstash-%7Bnow%2Fd%7D%3E/_search

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