Further error: in the syntax linked in the quoted post, if you remove the cloing bracket in line 12 and save, instead of getting an error report about a yaml syntax error, the editor will auto-close. When you try to open the editor again, it will auto-close immediately. This will subsist until you open the file with another editor and fix the missing bracket.
This coupled with the fact that the syntax higlighting for the sublime-syntax format doesnt recognise values of embed: as regexes but instead as normal strings makes it very annoying to have any error in your syntax.
Should I open a separate thread in Bug Reports for this?