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Date: Sat, 12 Jan 2019 13:52:27 +1300
From: umbraticus@prosimetrum.com
To: 9front@9front.org
Subject: Re: [9front] bug in sed
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yes, sam does it all at once, while sed iterates.

from sed(1):

                       g    Global.  Substitute for all non-
                            overlapping instances of the regular
                            expression rather than just the first one.

from ed(1):

               ... If the global replacement indi-
               cator `g' appears after the command, all subsequent
               matches on the line are also replaced...

So should "non-overlapping" and "subsequent" not apply to ^ matches?
I guess this was hiro's earlier point.