Quoting Stephen Powell on 2010-02-04 18:06:58:
> but in the general case, it's hard to tell. Since stdout and
> stderr both default to the terminal, and since the doc doesn't
> say, how else would you know other than by trial and error?
Trial and error is an effective way to figure it out. [1] Depending on a
few factors though, it may be more instructive long-term to read the
source. I've recently been putting that philosophy to use in various
things where the documentation's not quite clear. Both methods have
their merits.
[1] possibly redirect std{out,err} to separate temp files and view them?
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