[feature request] Support for var decs using the "indent and multiple declare" format

[silicons]

Yeah I know I don't like this but I'm stuck dealing with it.

[pali6]

Additional information: I believe this is supported for vars on datums (as goonstation sadly uses this syntax sometimes there), just not on local vars.

[SpaceManiac]

Might be the same thing as #60

[Taeivas]

I have the same issue as I am using indentation based variable definitions with the extension and having these false positives is not preferable.