Fix typo.
diff --git a/Doc/whatsnew/3.2.rst b/Doc/whatsnew/3.2.rst
index 2997f8f..40d5ae2 100644
--- a/Doc/whatsnew/3.2.rst
+++ b/Doc/whatsnew/3.2.rst
@@ -1165,8 +1165,8 @@
 IDLE
 ====
 
-* The format menu now has an option to clean-up source files by strip trailing
-  whitespace (:issue:`5150`).
+* The format menu now has an option to clean-up source files by stripping
+  trailing whitespace (:issue:`5150`).
 
 
 Build and C API Changes