Real Vim ninjas count every keystroke - do you?

Pick a challenge, fire up Vim, and show us what you got.

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$ gem install vimgolf
$ vimgolf setup
$ vimgolf put 5e4dfcccaa2db400090b66c3

prepend * to every non-blank line

Prepend an asterisk to every non-blank line in the input file.

Start file

This is a
very short

file, but it is 
still
full

of

surpises.

End file

*This is a
*very short

*file, but it is 
*still
*full

*of

*surpises.

View Diff

1,2c1,2
< This is a
< very short
---
> *This is a
> *very short
4,6c4,6
< file, but it is 
< still
< full
---
> *file, but it is 
> *still
> *full
8c8
< of
---
> *of
10c10
< surpises.
---
> *surpises.

Solutions by @008Genkai:

Created by: @johnreitano Tweet

1517 active golfers, 6208 entries

Solutions by @008Genkai:

10

#209 - 大矢元海 / @008Genkai

06/28/2020 at 06:48PM

11

#>574 - 大矢元海 / @008Genkai

06/28/2020 at 06:45PM

12

#>771 - 大矢元海 / @008Genkai

06/28/2020 at 06:44PM

13

#>817 - 大矢元海 / @008Genkai

06/28/2020 at 06:43PM

14

#>856 - 大矢元海 / @008Genkai

06/28/2020 at 06:38PM

15

#>940 - 大矢元海 / @008Genkai

06/28/2020 at 06:35PM

16

#>1023 - 大矢元海 / @008Genkai

06/28/2020 at 06:27PM

17

#>1108 - 大矢元海 / @008Genkai

06/28/2020 at 06:26PM

17

#>1108 - 大矢元海 / @008Genkai

06/28/2020 at 06:34PM

18

#>1153 - 大矢元海 / @008Genkai

06/28/2020 at 05:59PM

20

#>1257 - 大矢元海 / @008Genkai

06/28/2020 at 05:56PM

20

#>1257 - 大矢元海 / @008Genkai

06/28/2020 at 06:24PM

22

#>1359 - 大矢元海 / @008Genkai

06/28/2020 at 05:49PM

23

#>1398 - 大矢元海 / @008Genkai

06/28/2020 at 06:33PM