1Example from Hunt and McIlroy, “An Algorithm for Differential File Comparison.”
2https://www.cs.dartmouth.edu/~doug/diff.pdf
3
4-- old --
5a
6b
7c
8d
9e
10f
11g
12-- new --
13w
14a
15b
16x
17y
18z
19e
20-- diff --
21diff old new
22--- old
23+++ new
24@@ -1,7 +1,7 @@
25+w
26 a
27 b
28-c
29-d
30+x
31+y
32+z
33 e
34-f
35-g
36