Docs: Is value key optional?

[Eben60]

On running the code from the very first example in the docs I get an
ERROR: KeyError: key :value not found
Removing the line
"attributes" => Par(info = "This is a test signal table")
or changing it to
"attributes" => Par(value = nothing, info = "This is a test signal table"),
fixes the error.

[MartinOtter]

Sorry, the latest documentation was not pushed. This is now fixed.