#11515: fix several typos. Patch by Piotr Kasprzyk.
diff --git a/Lib/idlelib/HISTORY.txt b/Lib/idlelib/HISTORY.txt
index c0faaad..01d73ed 100644
--- a/Lib/idlelib/HISTORY.txt
+++ b/Lib/idlelib/HISTORY.txt
@@ -13,7 +13,7 @@
 - New tarball released as a result of the 'revitalisation' of the IDLEfork
   project. 
 
-- This release requires python 2.1 or better. Compatability with earlier
+- This release requires python 2.1 or better. Compatibility with earlier
   versions of python (especially ancient ones like 1.5x) is no longer a
   priority in IDLEfork development.