Fixed typo
Tweak language.
Fix #2296 `get` works with `0` as a model id
Simplify test
Tweak .parse(opt) to be .parse(attrs) for descriptiveness.
Merge pull request #2304 from dillonforrest/fix/descriptive-parse-tests

In tests, I tweaked model.parse(opt) to be model.parse(attrs) for descriptiveness
Merge remote-tracking branch 'remotes/documentcloud-original/master'
Merge branch 'master' into gh-pages