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 @IvanKwong5:

Unlock 6 remaining solutions by signing in and submitting your own entry
Created by: @johnreitano

1410 active golfers, 5736 entries

Solutions by @IvanKwong5:
10
#302 - Ivan Kwong / @IvanKwong5

09/26/2020 at 09:35AM

11
#>571 - Ivan Kwong / @IvanKwong5

08/09/2020 at 11:03AM

11
#>603 - Ivan Kwong / @IvanKwong5

09/26/2020 at 09:34AM

12
#>708 - Ivan Kwong / @IvanKwong5

08/09/2020 at 11:02AM

14
#>792 - Ivan Kwong / @IvanKwong5

08/09/2020 at 10:50AM

15
#>871 - Ivan Kwong / @IvanKwong5

08/09/2020 at 10:47AM