collatejons: Do not insert space between elements.

Change-Id: I0feee97b6b4bef953d6b672591e842dded22393b
Reviewed-on: http://review.couchbase.org/43893
Reviewed-by: Sarath Lakshman <sarath@couchbase.com>
Reviewed-by: Pratap Chakravarthy <prataprc@couchbase.com>
Tested-by: Pratap Chakravarthy <prataprc@couchbase.com>