Move helper function

`test_utils.py` is actually a file for testing some utils, not
some utils for testing.

Test helper functions and fixtures are better placed in conftest,
and also means that we can use them in conftest.

tests/conftest.py

@@ -1778,3 +1778,9 @@ def client_request(logged_in_client):
             return BeautifulSoup(resp.data.decode('utf-8'), 'html.parser')
 
     return ClientRequest
+
+
+def normalize_spaces(input):
+    if isinstance(input, str):
+        return ' '.join(input.split())
+    return normalize_spaces(' '.join(item.text for item in input))