Marked keystrokes with the :kbd: role.
Fixed the case of the "Ctrl-" prefixes.
diff --git a/Doc/library/idle.rst b/Doc/library/idle.rst
index e64f683..ecc7115 100644
--- a/Doc/library/idle.rst
+++ b/Doc/library/idle.rst
@@ -330,8 +330,8 @@
Editing and navigation
----------------------
-In this section, 'C' refers to the Control key on Windows and Unix and
-the Command key on Mac OSX.
+In this section, 'C' refers to the :kbd:`Control` key on Windows and Unix and
+the :kbd:`Command` key on Mac OSX.
* :kbd:`Backspace` deletes to the left; :kbd:`Del` deletes to the right