use new style optional args

diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index cc05a7df1ccace8da6322ee1b825c8ac16fa2a7d..d3789d40f2c45879af876f63ce22529b46d27592 100644 (file)
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -565,7 +565,7 @@ rule:
 Helper functions
 ----------------
 
-.. function:: capwords(s[, sep])
+.. function:: capwords(s, sep=' ')
 
    Split the argument into words using :meth:`str.split`, capitalize each word
    using :meth:`str.capitalize`, and join the capitalized words using