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 @xb_I_dx:

Created by: @johnreitano Tweet

1521 active golfers, 6234 entries

Solutions by @xb_I_dx:

11

#743 - 雷 / @xb_I_dx

03/05/2023 at 01:21AM

12

#>798 - 雷 / @xb_I_dx

03/05/2023 at 01:19AM

13

#>835 - 雷 / @xb_I_dx

03/05/2023 at 01:17AM

14

#>899 - 雷 / @xb_I_dx

03/05/2023 at 12:44AM

14

#>899 - 雷 / @xb_I_dx

03/05/2023 at 12:45AM

15

#>985 - 雷 / @xb_I_dx

03/05/2023 at 12:42AM

17

#>1138 - 雷 / @xb_I_dx

03/05/2023 at 12:36AM

18

#>1176 - 雷 / @xb_I_dx

03/05/2023 at 12:32AM

34

#>1491 - 雷 / @xb_I_dx

03/05/2023 at 12:32AM