Added test to reproduce case

Case is for file using CRLF endings

Author: edobez

tests/end_of_file_fixer_test.py

@@ -18,6 +18,7 @@
     (b'foo\n\n\n', 1, b'foo\n'),
     (b'\xe2\x98\x83', 1, b'\xe2\x98\x83\n'),
     (b'foo\r\n', 0, b'foo\r\n'),
+    (b'foo\r\nbar', 1, b'foo\r\nbar\r\n'),
     (b'foo\r\n\r\n\r\n', 1, b'foo\r\n'),
     (b'foo\r', 0, b'foo\r'),
     (b'foo\r\r\r\r', 1, b'foo\r'),