[Firefox 3.1] toISOString returns "2008-10-21T15:06:11.324Z" instead of ""2008-10-21T15:06:11.324Z""

```
Note:
This issue relates to a nightly-build of Firefox 3.1, so it may not warrent
any action just yet since it could change again before the actual release
of 3.1. I'm posting it here though just in case though.

What steps will reproduce the problem?
1. Using Firefox 3.1b2pre (>= nightly build for 10-20-2008):
2. var d = new Date();
3. d.toISOString()

What is the expected output? What do you see instead?

expected:
~ ""2008-10-21T15:06:31Z""

see:
~ "2008-10-21T15:06:11.324Z"

What version of the product are you using? On what operating system?
Firefox 3.1b2pre (nightly build for 10-20-2008)

Please provide any additional information below.
This issue only started occurring in 3.1 as far as I know since the
10-20-2008 nightly build. The result of the switch is that some code used
to drop the extra quotation marks (slice(1,-1)) now drops important parts
of the date.
```

Original issue reported on code.google.com by `keith.hu...@gmail.com` on 21 Oct 2008 at 3:13