Update jupyter_server/extension/manager.py

Author: Zsailer

jupyter_server/extension/manager.py

@@ -275,7 +275,7 @@ def from_jpserver_extensions(self, jpserver_extensions):
             self.add_extension(name, enabled=enabled)
 
     def add_extension(self, extension_name, enabled=False):
-        """Try to add extension to manager, return True is successful.
+        """Try to add extension to manager, return True if successful.
         Otherwise, return False.
         """
         try:
@@ -325,4 +325,3 @@ def load_all_extensions(self, serverapp):
         # order.
         for name in sorted(self.extensions.keys()):
             self.load_extension(name, serverapp)
-