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Spidermonkey has the useful behavior of printing a newline when no argument is passed:
This can be easily worked around by passing an empty string, but it prevents reuse of code between the two implementations.
Created an attachment (id=21562) [details]
(From update of attachment 21562 [details])
+ if (args.size())
I would rather you use !args.isEmpty() here.
Landed in r34428.