--- a_file.txt	Fri Feb  1 13:30:39 2013
+++ b_file.txt	Fri Feb  1 13:30:55 2013
@@ -1,6 +1,4 @@
-a_file.txt sample:
+b_file.txt sample:
 http://www.ok.com/test_www.pdf
-http://www.ok.com/test_1234.html
 http://www.ok.com/test_part.pdf
 http://www.ok.com/test_345.pdf
-http://www.ok.com/test_error.html