Documentation: Alternation within "say" command can be nested

Feature Request

Documentation for alternation within "say" command.

This one is a very nice feature. I described a similar technique in a blog post which I often use in my non-litexa skills: https://github.com/fboerncke/alexa-unwrap-text-variations

litexa 0.7.1

Now as this is not obvious but very useful the Litexa documentation might make explicit that alternations within Litexa may be nested like:

say "(Alpha (Delta|Gammy|Iota)|Epsilon (Kappa|Lambda) |Beta) test."

Just a thought.