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 @zaid_emad97:

Unlock 11 remaining solutions by signing in and submitting your own entry
Created by: @johnreitano

1530 active golfers, 6253 entries

Solutions by @zaid_emad97:
10
#72 - zaid emad / @zaid_emad97

03/25/2020 at 10:08AM

10
#>72 - zaid emad / @zaid_emad97

03/25/2020 at 10:08AM

10
#>72 - zaid emad / @zaid_emad97

03/25/2020 at 10:10AM

10
#>72 - zaid emad / @zaid_emad97

03/25/2020 at 10:11AM

11
#>498 - zaid emad / @zaid_emad97

03/25/2020 at 09:31AM

12
#>766 - zaid emad / @zaid_emad97

03/25/2020 at 09:25AM

15
#>918 - zaid emad / @zaid_emad97

03/25/2020 at 09:20AM

16
#>1005 - zaid emad / @zaid_emad97

03/25/2020 at 08:54AM

16
#>1005 - zaid emad / @zaid_emad97

03/25/2020 at 09:17AM

21
#>1308 - zaid emad / @zaid_emad97

03/25/2020 at 08:49AM

21
#>1308 - zaid emad / @zaid_emad97

03/25/2020 at 08:52AM