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 @Yotsuba06764225:

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

1521 active golfers, 6234 entries

Solutions by @Yotsuba06764225:
11
#692 - Yotsuba / @Yotsuba06764225

12/22/2020 at 03:52AM

12
#>792 - Yotsuba / @Yotsuba06764225

12/22/2020 at 03:32AM

14
#>888 - Yotsuba / @Yotsuba06764225

12/22/2020 at 03:21AM

15
#>974 - Yotsuba / @Yotsuba06764225

12/22/2020 at 03:02AM

16
#>1066 - Yotsuba / @Yotsuba06764225

12/22/2020 at 03:01AM

17
#>1132 - Yotsuba / @Yotsuba06764225

12/22/2020 at 02:48AM

20
#>1279 - Yotsuba / @Yotsuba06764225

12/21/2020 at 12:46AM

22
#>1380 - Yotsuba / @Yotsuba06764225

12/21/2020 at 12:44AM