style: no-multi-assign

[curbengh]

What does it do?

hexojs/eslint-config-hexo#22

ref: https://eslint.org/docs/rules/no-multi-assign

How to test

git clone -b no-multi-assign https://github.com/USER/hexo.git
cd hexo
npm install
npm test

Pull request tasks

• Passed the CI test.

[coveralls]

Coverage decreased (-0.02%) to 97.293% when pulling 2ed258e on curbengh:no-multi-assign into a8bb7b8 on hexojs:master.

[curbengh]

warehouse also have plenty of multi-assign, so it depends whether we shall proceed all the way.

[tomap]

warehouse also have plenty of multi-assign, so it depends whether we shall proceed all the way.

not sure what you mean by that. But the code already looks good.
Maybe trying to play nice with code climate could be cool

[curbengh]

I mean this eslint rule involves the very core of hexo, so we need to thread carefully.