\versionadded: Add support for including an explanatory note along with
the versioning information, similar to \versionchanged.
diff --git a/Doc/texinputs/python.sty b/Doc/texinputs/python.sty
index 8a61d87..795882d 100644
--- a/Doc/texinputs/python.sty
+++ b/Doc/texinputs/python.sty
@@ -872,8 +872,13 @@
% \versionadded{1.5.2}
% \versionchanged[short explanation]{2.0}
%
-\newcommand{\versionadded}[1]{%
- { New in version #1. }}
+\newcommand{\versionadded}[2][\py@badkey]{%
+ \ifx#1\@undefined%
+ { New in version #2. }%
+ \else%
+ { New in version #2:\ #1. }%
+ \fi%
+}
\newcommand{\versionchanged}[2][\py@badkey]{%
\ifx#1\@undefined%
{ Changed in version #2. }%