Simplify log statements.

Make use of format specifiers in the logging library rather than relying on
string.format(), which makes log output unnecessarily verbose.

samples/sample.py

@@ -11,7 +11,7 @@ logging.basicConfig(level=logging.INFO, format="%(asctime)-15s [%(levelname)s] %
 log = logging.getLogger(__name__)
 
 if __name__ == "__main__":
-    
+
     parser = argparse.ArgumentParser(
         description="Export all Garmin Connect activities")
     # positional args
@@ -26,22 +26,22 @@ if __name__ == "__main__":
 
     if not args.password:
         args.password = getpass.getpass("Enter password: ")
-        
+
     try:
         with GarminClient(args.username, args.password) as client:
             log.info("activities:")
             activity_ids = client.list_activities()
-            log.info("num ids: {}".format(len(activity_ids)))
+            log.info("num ids: %d", len(activity_ids))
             log.info(activity_ids)
 
             latest_activity, latest_activity_start = activity_ids[0]
             activity = client.get_activity_summary(latest_activity)
-            log.info("activity id: {}".format(activity["activity"]["activityId"]))
-            log.info("activity name: '{}'".format(activity["activity"]["activityName"]))
-            log.info("activity description: '{}'".format(activity["activity"]["activityDescription"]))
+            log.info("activity id: %s", activity["activity"]["activityId"])
+            log.info("activity name: '%s'", activity["activity"]["activityName"])
+            log.info("activity description: '%s'", activity["activity"]["activityDescription"])
             log.info(json.dumps(client.get_activity_details(latest_activity), indent=4))
             log.info(client.get_activity_gpx(latest_activity))
     except Exception as e:
-        log.error("failed with exception: {}".format(e))
-    finally:            
+        log.error("failed with exception: %s", e)
+    finally:
         log.info("done")