The release of eslint 4 introduced some breaking changes -- a full
upgrade guide can be found here [1].
In this change, the "no-useless-escape" and "indent" rules are disabled,
"indent" being replaced with "indent-legacy" to minimize breaks due to
lint. Also, extra spaces before comments and other assorted new lint
issues are corrected.
The long-term plan is to move away from the deprecated "indent-legacy"
rule and also reenable the "no-useless-escape" rule, but for now we
want to minimize breakages and not affect PG developer velocity.
[1] http://eslint.org/docs/user-guide/migrating-to-4.0.0
Change-Id: I8044256c95e3fe3f94fa9acc7922600908f8a0f4
076adcd4f8