Thanks for responding Laurent_R.

I don't think I need to worry about the edge cases. I did several steps before I got here, with massaging and normalizing the data. Your solution is like jeffa's. It seemed to execute, but did not edit the file to be worked on. I did add the name of that file to the end of the command you suggested.

I'll keep poking at this as time permits.

In reply to Re^2: one liner with separate input file? by MrGibbs
in thread one liner with separate input file? by MrGibbs

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