vis

a vi-like editor based on Plan 9's structural regular expressions
1.ref

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      2 vimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvim
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      8 vimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvim
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     11 vimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvim
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     17 vimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvim
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     20 vimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvimvim
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