test.throws doesn't seem to be up to date

Hello,

I noticed test.throws in nodeunit is not working the same as the node 0.4.11 assert.throws detailed here: http://nodejs.org/docs/v0.4.11/api/all.html#assert.throws

I am using nodeunit 0.5.4.

I will be sending a pull request shortly...

Start at the nodeunit test.throws entry point and compare its behavior with the Node 0.4.11 assert.throws documentation linked in the issue. Confirm the expected matching and failure behavior, then verify that nodeunit follows that documented contract with relevant tests.

Written by the indexing model from the issue text.