fix: check filename if no extensions match

tests/test_new.diff

@@ -201,6 +201,20 @@ index 0000000..525e25d
 +    #  This function should probably do something more interesting
 +    #  labels: help wanted
 +    pass
+diff --git a/tests/BUILD.bazel b/tests/BUILD.bazel
+new file mode 100644
+index 0000000..525e25d
+--- /dev/null
++++ b/tests/BUILD.bazel
+@@ -0,0 +1,23 @@
++def hello_world():
++    # TODO: Come up with a more imaginative greeting
++    print('Hello world')
++
++    # TODO: Do more stuff
++    #  This function should probably do something more interesting
++    #  labels: help wanted
++    pass
 diff --git a/tests/example_file.ahk b/src/tests/example_file.ahk
 new file mode 100644
 index 0000000..7cccc5b

tests/test_todo_parser.py

@@ -24,7 +24,7 @@ class NewIssueTests(unittest.TestCase):
 
     def test_python_issues(self):
         # Includes 2 tests for Starlark.
-        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'python'), 6)
+        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'python'), 8)
 
     def test_yaml_issues(self):
         self.assertEqual(count_issues_for_file_type(self.raw_issues, 'yaml'), 2)
@@ -56,7 +56,7 @@ class NewIssueTests(unittest.TestCase):
         self.assertEqual(count_issues_for_file_type(self.raw_issues, 'julia'), 2)
 
     def test_starlark_issues(self):
-        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'python'), 6)
+        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'python'), 8)
 
     def test_autohotkey_issues(self):
         self.assertEqual(count_issues_for_file_type(self.raw_issues, 'autohotkey'), 1)