Provider attribute is missing in generated types documentation

[scotje]

Add provider attribute to docs output. This parameter is a base part of all types. It does not show up in the documentation because it is defined in type.rb, instead of the individual type code files.

See also: https://tickets.puppetlabs.com/browse/PDOC-274

[binford2k]

Is this resolved in #231?

[DavidS]

Closing this as it apparently has already been done.