Removed re and added brackets

Author: semohr

test/test_plugins.py

@@ -19,7 +19,6 @@
 import logging
 import os
 import pkgutil
-import re
 import sys
 from unittest.mock import ANY, Mock, patch
 
@@ -582,7 +581,7 @@ def test_import_plugin(self, caplog, plugin_name):  #
 
         caplog.set_level(logging.WARNING)
         caplog.clear()
-        plugins.load_plugins(plugin_name)
+        plugins.load_plugins([plugin_name])
 
         # Check for warnings, is a bit hacky but we can make full use of the beets
         # load_plugins code that way