Merge pull request #25 from casework/update_case_utils_usage

Switch away from deprecated function

Author: ajnelson-nist

tests/as_import/consumer.py

@@ -18,7 +18,7 @@
 import logging
 import os
 
-import rdflib
+import rdflib.util
 
 import case_utils
 
@@ -42,7 +42,7 @@ def main():
             mtime_str = mtime_fh.read(64).strip()
     process_object = case_gnu_time.build_process_object(graph, NS_BASE, args.gnu_time_log, mtime_str, "custom-")
 
-    output_format = args.output_format or case_utils.guess_format(args.out_graph)
+    output_format = args.output_format or rdflib.util.guess_format(args.out_graph)
 
     graph.serialize(destination=args.out_graph, format=output_format)