VimGolf - real Vim ninjas count every keystroke!

Preferably without multi-cursor plugin

Originally asked as question on reddit by kpthunder: https://www.reddit.com/r/vim/comments/9fvsro/what_is_the_most_efficient_way_to_go_about/

Start file

newState.set('foo', foo);
newState.set('bar', bar);
newState.set('banana', banana);
newState.set('bears', bears);

End file

state.foo = payload.foo;
state.bar = payload.bar;
state.banana = payload.banana;
state.bears = payload.bears;

View Diff

1,4c1,4
< newState.set('foo', foo);
< newState.set('bar', bar);
< newState.set('banana', banana);
< newState.set('bears', bears);
---
> state.foo = payload.foo;
> state.bar = payload.bar;
> state.banana = payload.banana;
> state.bears = payload.bears;