Add module docstrings

tests/test_ip_info.py

@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
 
+"""MODULE: Provides test cases for app/ip_info.py."""
+
 from app.ip_info import (  # pragma: no cover
     get_ip_information,
     get_autonomous_system_number,

tests/test_main.py

@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
 
+"""MODULE: Provides test cases for app/main.py."""
+
 # from app.ip import is_ip_address
 
 

tests/test_query_normalisation.py

@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
 
+"""MODULE: Provides test cases for app/query_normalisation.py."""
+
 from app.query_normalisation import (  # pragma: no cover
     is_ip_address,
     resolve_domain_name,