diff --git a/mopidy/ext.py b/mopidy/ext.py
index 5db7c093..e6cfbb7c 100644
--- a/mopidy/ext.py
+++ b/mopidy/ext.py
@@ -83,8 +83,7 @@ class Extension(object):
         """List of library updater classes
 
         :returns: list of
-          :class:`~mopidy.backends.base.BaseLibraryUpdateProvider`
-        subclasses
+          :class:`~mopidy.backends.base.BaseLibraryUpdateProvider` subclasses
         """
         return []