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 @DanSharkey88:

Unlock 13 remaining solutions by signing in and submitting your own entry
Created by: @johnreitano

1517 active golfers, 6208 entries

Solutions by @DanSharkey88:
10
#187 - Dan / @DanSharkey88

06/12/2020 at 12:37AM

11
#>557 - Dan / @DanSharkey88

06/12/2020 at 12:36AM

12
#>770 - Dan / @DanSharkey88

06/12/2020 at 12:36AM

13
#>816 - Dan / @DanSharkey88

06/12/2020 at 12:35AM

14
#>853 - Dan / @DanSharkey88

06/12/2020 at 12:34AM

15
#>938 - Dan / @DanSharkey88

06/12/2020 at 12:32AM

16
#>1019 - Dan / @DanSharkey88

06/12/2020 at 12:31AM

17
#>1102 - Dan / @DanSharkey88

06/12/2020 at 12:30AM

18
#>1151 - Dan / @DanSharkey88

06/12/2020 at 12:29AM

19
#>1195 - Dan / @DanSharkey88

06/12/2020 at 12:28AM

21
#>1311 - Dan / @DanSharkey88

06/12/2020 at 12:25AM

26
#>1446 - Dan / @DanSharkey88

06/12/2020 at 12:24AM

66
#>1512 - Dan / @DanSharkey88

06/12/2020 at 12:21AM