Keys for RDF::Vocabulary::Term attributes should be symbols consistently.

[cdchapman]

The vocabulary writer currently only populates values with symbolic keys but the hash keys for term attributes are not all symbols, but a mix of strings and symbols. Keys that are not one of the vocabulary-specific predicates (e.g. dc:description) are not created as symbols, but as strings, and the objects of these string-keyed predicates are consequently not being populated in generated vocabularies.

[cdchapman]

Actually I think this was already fixed in fc06d1f by @gkellogg. I thought I was running the latest code, but I am running v2.0.2. 😊

[cdchapman]

Request for new release?

[gkellogg]

We'll get one out in the next day or so.

[no-reply]

👍 to a release.

I got #310 in, so we can have a real feature to ship with it. ;)

I noticed the inefficiency in #311 in the process. If we ship 2.1.0, I will probably backport this change to 2.0.x.

[cdchapman]

👍 Thank you!