[Feature suggestion] Relaxed parsing for <?theme action?>

[fancsali]

As far as I could tell, the parser will insist, that there is no spaces between the theme-tag opening/closing <?/?> and the keywords. So at the moment this would not be understood:

`<? theme body ?>`

I am proposing to modify the parser to accept white-space there.

[Orc]

Sure, if you'd be willing to adhere to the existing licence!