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 @dadams217:

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

1514 active golfers, 6202 entries

Solutions by @dadams217:
10
#341 - dadams2 / @dadams217

10/30/2020 at 02:13PM

11
#>668 - dadams2 / @dadams217

10/30/2020 at 02:12PM

12
#>785 - dadams2 / @dadams217

10/30/2020 at 02:11PM

13
#>824 - dadams2 / @dadams217

10/30/2020 at 02:10PM

14
#>879 - dadams2 / @dadams217

10/30/2020 at 02:09PM

14
#>879 - dadams2 / @dadams217

10/30/2020 at 02:10PM

15
#>963 - dadams2 / @dadams217

10/30/2020 at 02:06PM

16
#>1055 - dadams2 / @dadams217

10/30/2020 at 02:05PM

17
#>1123 - dadams2 / @dadams217

10/30/2020 at 02:04PM

18
#>1161 - dadams2 / @dadams217

10/30/2020 at 02:03PM

19
#>1208 - dadams2 / @dadams217

10/30/2020 at 02:02PM

20
#>1271 - dadams2 / @dadams217

10/30/2020 at 01:55PM

21
#>1319 - dadams2 / @dadams217

10/30/2020 at 01:53PM