HAMLLint: Fix `ImplicitDiv` offences

app/views/admin/groups/show.html.haml

app/views/admin/hooks/index.html.haml

app/views/devise/sessions/_new_base.html.haml

app/views/devise/shared/_omniauth_box.html.haml

app/views/devise/shared/_signup_box.html.haml

app/views/doorkeeper/applications/index.html.haml

app/views/groups/show.html.haml

app/views/kaminari/gitlab/_paginator.html.haml

app/views/layouts/header/_default.html.haml

app/views/layouts/notify.html.haml

app/views/profiles/keys/index.html.haml

app/views/profiles/notifications/show.html.haml

app/views/projects/_bitbucket_import_modal.html.haml

app/views/projects/_customize_workflow.html.haml

app/views/projects/_gitlab_import_modal.html.haml

app/views/projects/_md_preview.html.haml

app/views/projects/_wiki.html.haml

app/views/projects/artifacts/browse.html.haml

app/views/projects/blob/_blob.html.haml

app/views/projects/blob/show.html.haml