You can install this plugin via the Packages manager in Atom itself or manually through the terminal
$ apm install htmlhint
HTMLHint is by default validating on save (this can be changed in the package settings), you can also execute it by hitting ctrl-alt-l
.
If you like you can even set it to validate while typing in the package settings.
fold mode
by default (toggle in settings)
MIT © tcarlsen
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.