Syntax file seems to split tokens on identifier delimiters even within strings

Manifested as broken-apart highlighting when doing goto-def on import in vscode:

```import "some_dir/some_file.dml"```

Breaks the highlighting apart between some_dir, some_file, and dml. Should treat everything within double-quotes as one token.

Overall a low-prio issue, does not affect actual functionality within vscode (goto-def on any of the parts still works)