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 @anhpt379:

Created by: @johnreitano Tweet

1517 active golfers, 6208 entries

Solutions by @anhpt379:

10

#143 - Pham Tuan Anh / @anhpt379

05/17/2020 at 04:36PM

10

#>143 - Pham Tuan Anh / @anhpt379

05/17/2020 at 04:37PM

11

#>540 - Pham Tuan Anh / @anhpt379

05/17/2020 at 04:36PM

11

#>730 - Pham Tuan Anh / @anhpt379

07/10/2022 at 07:11AM

12

#>766 - Pham Tuan Anh / @anhpt379

05/17/2020 at 04:35PM

13

#>811 - Pham Tuan Anh / @anhpt379

05/17/2020 at 04:35PM

15

#>928 - Pham Tuan Anh / @anhpt379

05/17/2020 at 04:32PM

16

#>1010 - Pham Tuan Anh / @anhpt379

05/17/2020 at 04:30PM

16

#>1073 - Pham Tuan Anh / @anhpt379

07/10/2022 at 07:10AM

18

#>1172 - Pham Tuan Anh / @anhpt379

07/10/2022 at 07:10AM

36

#>1493 - Pham Tuan Anh / @anhpt379

05/17/2020 at 04:32PM

47

#>1505 - Pham Tuan Anh / @anhpt379

07/10/2022 at 07:10AM