Changes

__TOC_ Sometimes builds and tests need to be retriggered. For some classes of automation/infrastructure failures, this happens automatically and the job is marked in the [https://treeherder.mozilla.org/userguide.html Treeherder UI] as dark blue. For other cases, or if you're doing investigative work e.g. testing for an intermittent failure, you'll need to retrigger the job manually.