cat testpatch.patch
diff -ru patch/test patch1/test
--- patch/test  2007-10-02 10:32:58.000000000 +0200
+++ patch1/test 2007-10-02 10:37:27.000000000 +0200
@@ -1 +1 @@
-Papa hat Geburtstag
+Papa hat Geburtstag am 03.03.