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 @tobydeh:

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

1493 active golfers, 6120 entries

Solutions by @tobydeh:
10
#98 - Toby de Havilland / @tobydeh

04/18/2020 at 08:48PM

11
#>497 - Toby de Havilland / @tobydeh

04/18/2020 at 08:46PM

12
#>743 - Toby de Havilland / @tobydeh

04/18/2020 at 08:46PM

13
#>787 - Toby de Havilland / @tobydeh

04/18/2020 at 08:45PM

14
#>823 - Toby de Havilland / @tobydeh

04/18/2020 at 08:44PM

15
#>900 - Toby de Havilland / @tobydeh

04/18/2020 at 08:43PM

16
#>982 - Toby de Havilland / @tobydeh

04/18/2020 at 08:37PM

17
#>1067 - Toby de Havilland / @tobydeh

04/18/2020 at 08:33PM

20
#>1215 - Toby de Havilland / @tobydeh

04/18/2020 at 08:31PM

21
#>1281 - Toby de Havilland / @tobydeh

04/18/2020 at 08:26PM

24
#>1392 - Toby de Havilland / @tobydeh

04/18/2020 at 07:34PM

25
#>1403 - Toby de Havilland / @tobydeh

04/18/2020 at 07:35PM

31
#>1453 - Toby de Havilland / @tobydeh

04/18/2020 at 07:28PM