scope name capture substitution seem to trigger only once

[msftrncs]

With a scope reference such as:

	"name": "storage.type.$0.powershell keyword.declaration.$0.powershell"

The $0 replacement only seems to happen on the first instance, as I get the following result:

My understanding is that these are equivalent to regex replacements (only nothing is getting replaced), and of all the regex engines I have used the 'replace' function on seem to handle multiple references to the same capture.

However, I cannot confirm any other TextMate based editor works differently, though I will be able to try Atom at some point.

[msftrncs]

I can confirm that this seems to work as expected in Atom (1.41 and 1.54).

(However note that Atom considers the entire string as a single scope, instead of two, and this causes some issues with how themes apply)

I think I have tracked this down to a lack of a global modifier on the regex that handles this. Tracking this down caused me to learn that there is a method for 'casing' the substitution, good to know!

${n:/upcase}
${n:/downcase}

Where n refers to the capture group contents to be substituted.