Fixed error related to display_format in config file

Now _display_search_results tries to source the export arg from the
config file before dispaying search results.

jrnl/jrnl.py

@@ -373,6 +373,9 @@ def _change_time_search_results(args, journal, old_entries, no_prompt=False, **k
 
 
 def _display_search_results(args, journal, **kwargs):
+    # Get export format from config file if not provided at the command line
+    args.export = args.export or kwargs["config"].get("display_format")
+
     if args.short or args.export == "short":
         print(journal.pprint(short=True))
 
@@ -385,8 +388,5 @@ def _display_search_results(args, journal, **kwargs):
     elif args.export:
         exporter = plugins.get_exporter(args.export)
         print(exporter.export(journal, args.filename))
-    elif kwargs["config"].get("display_format"):
-        exporter = plugins.get_exporter(kwargs["config"]["display_format"])
-        print(exporter.export(journal, args.filename))
     else:
         print(journal.pprint())