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 @Digang_e:

Created by: @johnreitano Tweet

1535 active golfers, 6298 entries

Solutions by @Digang_e:

11

#736 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:38AM

12

#>804 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:37AM

13

#>842 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:37AM

14

#>903 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:36AM

15

#>991 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:33AM

16

#>1085 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:33AM

17

#>1149 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:32AM

18

#>1187 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:31AM

20

#>1303 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:30AM

21

#>1346 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:30AM

22

#>1399 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:28AM

23

#>1427 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:28AM

23

#>1427 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:29AM

23

#>1427 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:30AM

25

#>1459 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:27AM

25

#>1459 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:29AM

28

#>1484 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:27AM

30

#>1495 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:25AM

45

#>1522 - Digang's 트위터 / @Digang_e

03/23/2022 at 05:22AM