Update signature style of optional arguments, part two.
diff --git a/Doc/library/cgitb.rst b/Doc/library/cgitb.rst
index 854ea95..6827c8e 100644
--- a/Doc/library/cgitb.rst
+++ b/Doc/library/cgitb.rst
@@ -1,4 +1,3 @@
-
:mod:`cgitb` --- Traceback manager for CGI scripts
==================================================
@@ -34,7 +33,7 @@
analysis.
-.. function:: enable([display[, logdir[, context[, format]]]])
+.. function:: enable(display=1, logdir=None, context=5, format="html")
.. index:: single: excepthook() (in module sys)
@@ -51,7 +50,7 @@
value forces plain text output. The default value is ``"html"``.
-.. function:: handler([info])
+.. function:: handler(info=None)
This function handles an exception using the default settings (that is, show a
report in the browser, but don't log to a file). This can be used when you've