module RSpec::Support::Spec::DiffHelpers

def one_line_header(line_number=2)
  "-1,#{line_number} +1,#{line_number}"
end

def one_line_header(_=2)
  "-1 +1"
end

def one_line_header(line_number=2)
  if line_number - 1 == 1
    "-1 +1"
  else
    "-1,#{line_number - 1} +1,#{line_number - 1}"
  end
end

def removing_two_line_header
  "-1,2 +0,0"
end

def removing_two_line_header
  "-1,3 +1"
end

def removing_two_line_header
  "-1,3 +1,5"
end