NetworkCoreWUtils: strip off leading and trailing quotes from parse_modes

classes.py

@@ -560,6 +560,13 @@ class PyLinkNetworkCoreWithUtils(PyLinkNetworkCore):
             args = args.split()
 
         assert args, 'No valid modes were supplied!'
+
+        # Strip off matching quotes from argparse and friends. We don't use str.strip()
+        # because that might remove quotes that actually belong at the end of a string
+        # (e.g. text filter args)
+        if args.startswith(("'", '"')) and args.endswith(("'", '"')):
+            args = args[1:-1]
+
         usermodes = not self.is_channel(target)
         prefix = ''
         modestring = args[0]