Document possible a/an matcher parameters

[jurko-gospodnetic]

The values passed to a/an matchers seem to correspond to the type-detect library's results reported for specific objects. That means that since that library got introduced, e.g. new Error(...) is no longer detected as a object and is now detected as an error instead.

Could the documentation on those matchers be updated?

[keithamus]

Thanks for the issue @jurko-gospodnetic, that sounds like a great idea! PR very much wanted 😄

[keithamus]

I'll point out that the site has yet to be updated - it's getting quite stale but we need to spend some time redeveloping it to have automated builds.

The documentation for an is here (L127-155 of assertions.js) and the docs have been updated for the new behaviour (with an exception of Error missing). Feel free to include error as an example, and when the new site gets built it'll be reflected!

[jurko-gospodnetic]

Added pull request #521 for this.