:new: [message-element-spec] Add specs for message element
:new: [message-element-spec] Add specs for message element

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