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 51b4e3b920faf70002000001

Number an outline

The indent and words are right, but the numbers are all wrong.

Start file

1. One
  1. One
    1. One
  1. Two
    1. One
    1. Two
      1. One
    1. Three
    1. Four
  1. Three
    1. One
      1. One
      1. Two
    1. Two
  1. Four
    1. One
    1. Two
    1. Three
    1. Four
    1. Five
    1. Six
  1. Five
    1. One
    1. Two
    1. Three
1. Two
  1. One
    1. One
    1. Two
    1. Three
    1. Four
    1. Five
  1. Two

End file

1. One
  1. One
    1. One
  2. Two
    1. One
    2. Two
      1. One
    3. Three
    4. Four
  3. Three
    1. One
      1. One
      2. Two
    2. Two
  4. Four
    1. One
    2. Two
    3. Three
    4. Four
    5. Five
    6. Six
  5. Five
    1. One
    2. Two
    3. Three
2. Two
  1. One
    1. One
    2. Two
    3. Three
    4. Four
    5. Five
  2. Two

View Diff

4c4
<   1. Two
---
>   2. Two
6c6
<     1. Two
---
>     2. Two
8,10c8,10
<     1. Three
<     1. Four
<   1. Three
---
>     3. Three
>     4. Four
>   3. Three
13,15c13,15
<       1. Two
<     1. Two
<   1. Four
---
>       2. Two
>     2. Two
>   4. Four
17,22c17,22
<     1. Two
<     1. Three
<     1. Four
<     1. Five
<     1. Six
<   1. Five
---
>     2. Two
>     3. Three
>     4. Four
>     5. Five
>     6. Six
>   5. Five
24,26c24,26
<     1. Two
<     1. Three
< 1. Two
---
>     2. Two
>     3. Three
> 2. Two
29,33c29,33
<     1. Two
<     1. Three
<     1. Four
<     1. Five
<   1. Two
---
>     2. Two
>     3. Three
>     4. Four
>     5. Five
>   2. Two

Solutions by @powertomato:

Created by: @udioica Tweet

78 active golfers, 280 entries

Solutions by @powertomato: