Marked keystrokes with the :kbd: role.
Fixed the case of the "Ctrl-" prefixes.
diff --git a/Doc/tutorial/appendix.rst b/Doc/tutorial/appendix.rst
index befb96a..7ab588b 100644
--- a/Doc/tutorial/appendix.rst
+++ b/Doc/tutorial/appendix.rst
@@ -25,7 +25,7 @@
standard error stream; normal output from executed commands is written to
standard output.
-Typing the interrupt character (usually Control-C or DEL) to the primary or
+Typing the interrupt character (usually :kbd:`Control-C` or :kbd:`Delete`) to the primary or
secondary prompt cancels the input and returns to the primary prompt. [#]_
Typing an interrupt while a command is executing raises the
:exc:`KeyboardInterrupt` exception, which may be handled by a :keyword:`try`