pop_entry

# File tools/rail_inspector/lib/rail_inspector/changelog.rb, line 184
        def pop_entry
          # Ensure we don't pop an entry if we only see newlines and the footer
          return unless @lines.any? { |line| line.match?(/\S/) }

          @entries << Changelog::Entry.new(@lines, @current_line - @lines.length)
          @lines = []
        end