Handle list of tags in JSON, and be more clever about comma vs. space

tests/test_add.py

@@ -110,12 +110,19 @@ def test_json(tmp_path, process, disable_extractors_dict):
 
     urls = list(map(lambda x: x[0], urls))
     assert "http://127.0.0.1:8080/static/example.com.html" in urls
+    assert "http://127.0.0.1:8080/static/iana.org.html" in urls
+    assert "http://127.0.0.1:8080/static/shift_jis.html" in urls
+    assert "http://127.0.0.1:8080/static/title_og_with_html" in urls
     # if the following URL appears, we must have fallen back to another parser
     assert not "http://www.example.com/should-not-exist" in urls
 
     tags = list(map(lambda x: x[0], tags))
     assert "Tag1" in tags
     assert "Tag2" in tags
+    assert "Tag3" in tags
+    assert "Tag4 with Space" in tags
+    assert "Tag5" in tags
+    assert "Tag6 with Space" in tags
 
 def test_json_with_leading_garbage(tmp_path, process, disable_extractors_dict):
     with open('../../mock_server/templates/example.json.bad', 'r', encoding='utf-8') as f: