Google Code-in

Fix the Zulip JavaScript code style! This is a great way to learn the basics of refactoring, git workflow, and good style.

Instructions for eslint tasks are at https://github.com/zulip/zulip-gci/blob/master/tasks/eslint.md

For this task, fix the errors for rule s, p, a, c, e, -, b, e, f, o, r, e, -, b, l, o, c, k, s.