#11565: Fix several typos. Patch by Piotr Kasprzyk.
diff --git a/Lib/idlelib/extend.txt b/Lib/idlelib/extend.txt
index f5fb3e0..165e044 100644
--- a/Lib/idlelib/extend.txt
+++ b/Lib/idlelib/extend.txt
@@ -18,7 +18,7 @@
An IDLE extension class is instantiated with a single argument,
`editwin', an EditorWindow instance. The extension cannot assume much
-about this argument, but it is guarateed to have the following instance
+about this argument, but it is guaranteed to have the following instance
variables:
text a Text instance (a widget)