On Thu, Mar 19, 2020 at 11:53 AM Jeff King <peff@xxxxxxxx> wrote:
> On Thu, Mar 19, 2020 at 09:00:02PM +0700, Đoàn Trần Công Danh wrote:
> > Fix it by using literal `+` instead.
>
> This makes sense, I think. It could hurt a sed which is expected ERE and
> needs the "+" escaped, but I think such a sed would be wrong (and I
> imagine would break things elsewhere).
I had the same thought and considered suggesting a character class:
sed -n -e "1,4d" -e "s/^[+]//p" <"$1" >.tmp-1
to make it painfully obvious that "+" is not special in the
expression. But then I thought better of it -- for the same reason as
you (to wit: such a 'sed' would be wrong) -- and decided against
saying anything.
