vis
a vi-like editor based on Plan 9's structural regular expressions
git clone https://9o.is/git/vis.git
1.in
(891B)
1 01234567890123456789012345678901234567890123456789012345678901234567890123456789
2 1 0
3 2 1
4 3 2
5 4 3
6 5 4
7 6 5
8 7 6
9 8 7
10 9 8
11 01234567890123456789012345678901234567890123456789012345678901234567890123456789