Amend file path to fix test

tests/test_new.diff

@@ -593,7 +593,7 @@ diff --git a/src/Dockerfile b/src/Dockerfile
 new file mode 100644
 index 0000000..d340f6a
 --- /dev/null
-+++ b/Dockerfile
++++ b/src/Dockerfile
 @@ -0,0 +1,4 @@
 +WORKDIR /app
 +ENV PYTHONPATH /app

tests/test_process_diff.py

@@ -78,7 +78,7 @@ class IssueUrlInsertionTest(unittest.TestCase):
                      "Skipping because 'SKIP_PROCESS_DIFF_TEST' is 'true'")
     def test_url_insertion(self):
         self._setUp(['test_new.diff'])
-        self._standardTest(79)
+        self._standardTest(80)
 
     def test_line_numbering_with_deletions(self):
         self._setUp(['test_new_py.diff', 'test_edit_py.diff'])