Write Phorge application extension which uses backticked strings containing spaces.

"uses" in which way(s)? Is there a chance that you could provide some minimal, self-contained testcase?

Verify the javascript content from your extension.

How? Could you provide clearer steps that allow others to test this? Thanks a lot!

Please add some negative tests - things that could trigger this thing, but shouldn't.

For example

foo = "this isn't ` a `real` tick ";

"`there`; and back again";

There's maybe more possible things.