Fix a bug in the malformed_bbox fixture

Author: dmtucker

gjtk/test/fixtures.py

@@ -160,7 +160,7 @@ def link_without_type(link):
 
 @pytest.fixture
 def malformed_bbox(bbox):
-    return [bbox[0] + abs(bbox[1]), bbox[1]]
+    return [max(bbox[0], bbox[1]), min(bbox[0], bbox[1])]
 
 
 @pytest.fixture