[openstreetmap/openstreetmap-website] Replace deprecated String.prototype.substr() (PR #3462)

[Tom Hughes]

Looks [fine](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/slice#browser_compatibility).

-- 
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/pull/3462#issuecomment-1048119241
You are receiving this because you are subscribed to this thread.

Message ID: <openstreetmap/openstreetmap-website/pull/3462/c1048119241 at github.com>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/rails-dev/attachments/20220222/9f6e9e5c/attachment.htm>