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 512eda055d6ed80002000025

Parsing with CSV: Unify lines and result.

col1;col2;col3;col4 A;1;4;5 A;3;4; A;1;4; # New output: col1;col2;col3;col4 A;1(2x);3;4(3x);5 any ideas?

Start file

col1;col2;col3;col4
A;1;4;5
A;3;4;
A;1;4;

End file

col1;col2;col3;col4
A;1(2x);3;4(3x);5

View Diff

2,4c2
< A;1;4;5
< A;3;4;
< A;1;4;
---
> A;1(2x);3;4(3x);5

Solutions by @nickandbro:

Created by: @ValessioBrito Tweet

78 active golfers, 186 entries

Solutions by @nickandbro: