Add EditorNotFoundError and DocumentNotFoundError (!6246) · Merge requests · Administrator / sourcegraph · GitLab

Administrator requested to merge not-found-errors into master Oct 29, 2019

Created by: lguychard

Adding this so that these errors can be better grouped on Sentry: https://sentry.io/organizations/sourcegraph/issues/?project=1334031&query=is%3Aunresolved+%22not+found%3A%22&statsPeriod=14d