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 @GolferPer:

Unlock 8 remaining solutions by signing in and submitting your own entry
Created by: @johnreitano

1468 active golfers, 5977 entries

Solutions by @GolferPer:
11
#439 - perTheGolfer / @GolferPer

02/25/2020 at 07:14AM

12
#>716 - perTheGolfer / @GolferPer

02/25/2020 at 07:13AM

15
#>864 - perTheGolfer / @GolferPer

02/25/2020 at 07:07AM

16
#>946 - perTheGolfer / @GolferPer

02/25/2020 at 07:07AM

17
#>1035 - perTheGolfer / @GolferPer

02/25/2020 at 07:04AM

20
#>1179 - perTheGolfer / @GolferPer

02/24/2020 at 06:24PM

20
#>1196 - perTheGolfer / @GolferPer

04/28/2020 at 08:00AM

22
#>1332 - perTheGolfer / @GolferPer

12/22/2020 at 09:51AM