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 @Sebasti91439242:

Unlock 15 remaining solutions by signing in and submitting your own entry
Created by: @johnreitano

1428 active golfers, 5804 entries

Solutions by @Sebasti91439242:
10
#277 - Sebastian W. / @Sebasti91439242

09/01/2020 at 06:09PM

11
#>592 - Sebastian W. / @Sebasti91439242

09/01/2020 at 06:06PM

12
#>720 - Sebastian W. / @Sebasti91439242

09/01/2020 at 06:05PM

12
#>720 - Sebastian W. / @Sebasti91439242

09/01/2020 at 06:06PM

14
#>809 - Sebastian W. / @Sebasti91439242

09/01/2020 at 06:02PM

15
#>890 - Sebastian W. / @Sebasti91439242

09/01/2020 at 06:01PM

16
#>972 - Sebastian W. / @Sebasti91439242

09/01/2020 at 06:00PM

18
#>1082 - Sebastian W. / @Sebasti91439242

09/01/2020 at 05:56PM

18
#>1082 - Sebastian W. / @Sebasti91439242

09/01/2020 at 05:59PM

19
#>1129 - Sebastian W. / @Sebasti91439242

09/01/2020 at 05:09PM

19
#>1129 - Sebastian W. / @Sebasti91439242

09/01/2020 at 05:58PM

22
#>1282 - Sebastian W. / @Sebasti91439242

09/01/2020 at 05:08PM

32
#>1395 - Sebastian W. / @Sebasti91439242

09/01/2020 at 05:56PM

34
#>1399 - Sebastian W. / @Sebasti91439242

09/01/2020 at 05:58PM

206
#>1426 - Sebastian W. / @Sebasti91439242

09/01/2020 at 05:07PM