Fix comment [skip ci]

Author: adamtheturtle

tests/mock_vws/test_query.py

@@ -1095,7 +1095,8 @@ def test_png(
         # We check that the image we created is just slightly smaller than the
         # maximum file size.
         #
-        # This is just because of the implementation details of ``image_file``.
+        # This is just because of the implementation details of
+        # ``make_image_file``.
         assert image_content_size < max_bytes
         assert (image_content_size * 1.05) > max_bytes
 
@@ -1121,7 +1122,8 @@ def test_png(
         # We check that the image we created is just slightly larger than the
         # maximum file size.
         #
-        # This is just because of the implementation details of ``image_file``.
+        # This is just because of the implementation details of
+        # ``make_image_file``.
         assert image_content_size > max_bytes
         assert (image_content_size * 0.95) < max_bytes