negative context for grep?

glen herrmannsfeldt <[email protected]>
Newsgroups gmane.comp.gnu.utils
Message-ID <[email protected]> 
I wanted to see the third line after the line that matched,

grep -B -2 -A 3 important file

It seems that negative values aren't allowed.

I wonder if others think this would be useful, and not
so hard to add.

-- glen
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