Log number of results on a page

ia-cdx-search

@@ -54,7 +54,7 @@ async def wait_first_and_print(tasks):
 	assert all(len(v) == len(fields) for v in o[1:]), 'got unexpected response format'
 	for row in o[1:]:
 		print(json.dumps(dict(zip(fields, row))))
-	print(f'Completed processing page {task._ia_cdx_page}', file = sys.stderr)
+	print(f'Completed processing page {task._ia_cdx_page} ({len(o) - 1} results)', file = sys.stderr)
 	return task._ia_cdx_page, connection