Summary:
Mark all applicable Arcanist classes as "final", except PhutilLintEngine, which
needs a little finesse.
@jungejason / @nh, does this break any Facebook stuff?
Test Plan: Linter no longer raises warnings. Ran "testEverythingImplemented" in
Phabricator.
Reviewers: btrahan, jungejason, nh
Reviewed By: btrahan
CC: aran, epriestley
Maniphest Tasks: T795
Differential Revision: https://secure.phabricator.com/D1519
Summary: One day all "GUID" references will be gone, maybe.
Test Plan: grep, ran workflow before changing and got a warning about
deprecation
Reviewed By: aran
Reviewers: mgummelt, tuomaspelkonen, aran, jungejason
CC: aran
Differential Revision: 671
