Marked keystrokes with the :kbd: role.
Fixed the case of the "Ctrl-" prefixes.
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index a8a684c..1930f78 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -204,8 +204,8 @@
 
 .. cmdoption:: -c, --catch
 
-   Control-C during the test run waits for the current test to end and then
-   reports all the results so far. A second control-C raises the normal
+   :kbd:`Control-C` during the test run waits for the current test to end and then
+   reports all the results so far. A second :kbd:`Control-C` raises the normal
    :exc:`KeyboardInterrupt` exception.
 
    See `Signal Handling`_ for the functions that provide this functionality.