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 @cdan:

Created by: @johnreitano Tweet

1517 active golfers, 6208 entries

Solutions by @cdan:

10

#224 - cdan / @cdan

07/06/2020 at 09:35AM

11

#>585 - cdan / @cdan

07/06/2020 at 09:28AM

12

#>774 - cdan / @cdan

07/06/2020 at 09:25AM

13

#>818 - cdan / @cdan

07/06/2020 at 09:24AM

15

#>942 - cdan / @cdan

07/06/2020 at 09:14AM

16

#>1025 - cdan / @cdan

07/06/2020 at 09:13AM

17

#>1111 - cdan / @cdan

07/06/2020 at 09:10AM

19

#>1202 - cdan / @cdan

07/06/2020 at 09:04AM

19

#>1202 - cdan / @cdan

07/06/2020 at 09:09AM

20

#>1259 - cdan / @cdan

07/06/2020 at 09:03AM

21

#>1314 - cdan / @cdan

07/06/2020 at 09:01AM

22

#>1361 - cdan / @cdan

07/06/2020 at 09:00AM

23

#>1398 - cdan / @cdan

07/06/2020 at 08:59AM

26

#>1446 - cdan / @cdan

07/06/2020 at 08:55AM