Change acceptHMRUpdate weird code (if (!(process.env.NODE_ENV !== 'production')))

[0x00A1FA]

What problem is this solving

Helping developers understand the code better.

Proposed solution

Use if (if (process.env.NODE_ENV === 'production')) instead.

Describe alternatives you've considered

Off-topic: By the way, your issue form retained one element from what I presume is the old issue template from the Vue Router: Before creating a feature request make sure that: This hasn't been [requested before](https://github.com/vuejs/router/issues). (check out the requested before link).

[posva]

Thanks, I fixed the link! The code you are looking at is generated. The source code is just if (!__DEV__)