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 @u_hossein:

Unlock 3 remaining solutions by signing in and submitting your own entry
Created by: @johnreitano

1372 active golfers, 5623 entries

Solutions by @u_hossein:
10
#334 - Hossein Yousefi / @u_hossein

10/23/2020 at 01:26PM

12
#>703 - Hossein Yousefi / @u_hossein

10/23/2020 at 01:23PM

14
#>791 - Hossein Yousefi / @u_hossein

10/23/2020 at 01:07PM