Daniel Bachhuber b46b855070 REST API: Support non-Latin characters in template route regex.
Non-Latin characters are URL-encoded (e.g. `%cf%84%ce%b5%cf%83%cf%84`). Matching `%` in the route ensures templates with non-Latin titles can be properly saved.

Props antonyagrios, mburridge.
Fixes #57329.


git-svn-id: https://develop.svn.wordpress.org/trunk@55294 602fd350-edb4-49c9-b593-d223f7449a82
2023-02-07 23:45:18 +00:00
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