>>> print(''.join(context_diff('one\ntwo\nthree\nfour\n'.splitlines(True),
...       'zero\none\ntree\nfour\n'.splitlines(True), 'Original', 'Current')),
...       end="")
*** Original
--- Current
***************
*** 1,4 ****
  one
! two
! three
  four
--- 1,4 ----
+ zero
  one
! tree
  four
r‚