module Differ::Format::Color

def as_change(change)
  as_delete(change) << as_insert(change)
end

def as_delete(change)
  "\033[31m#{change.delete}\033[0m"
end

def as_insert(change)
  "\033[32m#{change.insert}\033[0m"
end

def format(change)
  (change.change? && as_change(change)) ||
  (change.delete? && as_delete(change)) ||
  (change.insert? && as_insert(change)) ||
  ''
end