Update assert.throws() and assert.doesNotThrow() docs
## assert.throws(block, [error], [message])
-Expects `block` to throw an error. `error` can be constructor, regexp or
+Expects `block` to throw an error. `error` can be constructor, `RegExp` or
validation function.
Validate instanceof using constructor:
## assert.doesNotThrow(block, [message])
-Expects `block` not to throw an error, see assert.throws for details.
+Expects `block` not to throw an error, see `assert.throws` for details.
## assert.ifError(value)