vendor/sebastian/diff/tests/fixtures/patch.txt

diff --git a/Foo.php b/Foo.php
index abcdefg..abcdefh 100644
--- a/Foo.php
+++ b/Foo.php
@@ -20,4 +20,5 @@ class Foo
     const ONE = 1;
     const TWO = 2;
+    const THREE = 3;
     const FOUR = 4;