:bug: Validate editor for editor-scoped messages in MessageRegistry
:bug: Validate editor for editor-scoped messages in MessageRegistry

mdgriffith/linter,DanPurdy/linter,e-jigsaw/Linter,JohnMurga/linter,Arcanemagus/linter,UltCombo/linter,kaeluka/linter,shawninder/linter,AsaAyers/linter,atom-community/linter,blakeembrey/linter,levity/linter,steelbrain/linter,elkeis/linter,AtomLinter/Linter