CFR: 8020977: StringJoiner merges with itself not as expected

[Mike Duigou]

Looks good to me as well.

Mike

On Jul 29 2013, at 19:30 , Henry Jen wrote:

> Hi,
> 
> Please review a simple fix for 8020977.
> 
> The fix grab the length before initiate copying operation, so that the
> 'delimiter' added for this won't be included in copy.
> 
> For rest cases, the timing window changed a little, but that's fine as
> simultaneous changes is not determined.
> 
> Cheers,
> Henry