New rule: Disallow spacing between rest and spread operators and their expressions (rest-spread-spacing)

[feross]

http://eslint.org/docs/rules/rest-spread-spacing

This one should be uncontroversial:

// BAD
fn(... args)
[... arr, 4, 5, 6]
let [a, b, ... arr] = [1, 2, 3, 4, 5]
function fn(... args) { console.log(args) }
let { x, y, ... z } = { x: 1, y: 2, a: 3, b: 4 }
let n = { x, y, ... z }

// GOOD
fn(...args)
[...arr, 4, 5, 6]
let [a, b, ...arr] = [1, 2, 3, 4, 5]
function fn(...args) { console.log(args) }
let { x, y, ...z } = { x: 1, y: 2, a: 3, b: 4 }
let n = { x, y, ...z }

[feross]

No test failures at all on this one, and it's pretty obvious, so I'm just going to merge straight away so it can go into the standard v8 RC 👍

1..424
# tests 424
# pass  424

# ok

Collaborators/community folks, let me know if you disagree or have thoughts.