On Thu, Jan 2, 2014 at 10:21 AM, S. Dale Morrey <[email protected]> wrote:
> I should have mentioned that the data is UTF-8 not strictly ASCII and we
> need to preserve the encoding.
>

Makes me think of sed.

http://stackoverflow.com/questions/3557037/appending-a-line-to-a-file-only-if-it-doesnt-already-exist-using-sed


-- 
Chris Wood
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