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 @WayanLW:

Unlock 10 remaining solutions by signing in and submitting your own entry
Created by: @johnreitano

1537 active golfers, 6308 entries

Solutions by @WayanLW:
10
#255 - Super User / @WayanLW

08/07/2020 at 11:41AM

10
#>319 - Super User / @WayanLW

10/10/2020 at 06:17AM

11
#>617 - Super User / @WayanLW

08/07/2020 at 11:39AM

12
#>789 - Super User / @WayanLW

08/07/2020 at 11:38AM

12
#>795 - Super User / @WayanLW

10/10/2020 at 06:10AM

13
#>832 - Super User / @WayanLW

08/07/2020 at 11:37AM

15
#>952 - Super User / @WayanLW

06/16/2020 at 11:15AM

16
#>1035 - Super User / @WayanLW

06/16/2020 at 11:01AM

17
#>1121 - Super User / @WayanLW

06/14/2020 at 07:47AM

26
#>1465 - Super User / @WayanLW

06/14/2020 at 07:35AM