Decaffination replaces someString[index..-1] with
someString.slice(index, -1 + 1), which is bizzare. This commit changes those
instances to someString.slice(index).
Test Plan: Lots of tests, mostly updated to enzyme. Not many new ones.
Reviewers: evan, juan, jackie
Reviewed By: juan, jackie
Subscribers: juan
Differential Revision: https://phab.nylas.com/D3374
Dramatically clean up and simply the spec bootup process.
Converting spec bootup system to es6 from coffee.
Converted old `jasmine-helper`, `spec-helper`, and `spec-suite` to a new
`n1-spec-runner` file.
Each of these old files had tons and tons of code related to various parts
of the spec bootup and running process.
Each of those parts have been extracted into individual files
