class SimpleCov::Formatter::Base

def relative_or_absolute_output_path
  absolute = output_path
  relative = Pathname.new(absolute).relative_path_from(Pathname.pwd).to_s
  relative.start_with?("..") ? absolute : relative
rescue ArgumentError
  # Pathname#relative_path_from raises across mixed absolute/
  # relative inputs (and across Windows drives) — keep the
  # absolute form on any unresolvable case.
  output_path
end