gitlab-org--gitlab-foss/app/views/discussions/_parallel_diff_discussion.html.haml

- expanded = [*discussions_left, *discussions_right].any?(&:expanded?)
%tr.notes_holder{ class: ('hide' unless expanded) }
  - if discussions_left
    %td.notes_line.old
    %td.notes_content.parallel.old
      .content{ class: ('hide' unless discussions_left.any?(&:expanded?)) }
        = render partial: "discussions/notes", collection: discussions_left, as: :discussion, line_type: 'old', locals: { disable_collapse_class: true }
  - else
    %td.notes_line.old= ("")
    %td.notes_content.parallel.old
      .content

  - if discussions_right
    %td.notes_line.new
    %td.notes_content.parallel.new
      .content{ class: ('hide' unless discussions_right.any?(&:expanded?)) }
        = render partial: "discussions/notes", collection: discussions_right, as: :discussion, line_type: 'new', locals: { disable_collapse_class: true }
  - else
    %td.notes_line.new= ("")
    %td.notes_content.parallel.new
      .content