Multiple currencies per account

[tatablack]

Hi - I just started looking at Beancount, so I'm trying the syntax in test files.

From the official docs (and from running bean-check) it seems possible to use the open directive to open an account holding multiple comma-separated currencies, while your plugin seems to disallow it (eol expected, got '.').

[Ramblurr]

Oh that looks like an oversight on my part, will try to fix that.