IDLE: Fix typos in docs and comments (GH-13749)
diff --git a/Lib/idlelib/config.py b/Lib/idlelib/config.py
index aa94d65..12113c1 100644
--- a/Lib/idlelib/config.py
+++ b/Lib/idlelib/config.py
@@ -12,7 +12,7 @@
there are separate dicts for default and user values. Each has
config-type keys 'main', 'extensions', 'highlight', and 'keys'. The
value for each key is a ConfigParser instance that maps section and item
-to values. For 'main' and 'extenstons', user values override
+to values. For 'main' and 'extensions', user values override
default values. For 'highlight' and 'keys', user sections augment the
default sections (and must, therefore, have distinct names).