Add a note about when the "%r" formatting code was added.

diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex
index e7275cec14e800e1ad5e8e731fec78fe32ec243b..75787bad60b8d3ef52d86c88e09c6e9a8f2b6fe0 100644 (file)
--- a/Doc/lib/libstdtypes.tex
+++ b/Doc/lib/libstdtypes.tex
@@ -816,6 +816,7 @@ The conversion types are:
 
 % XXX Examples?
 
+(The \code{\%r} conversion was added in Python 2.0.)
 
 Since Python strings have an explicit length, \code{\%s} conversions
 do not assume that \code{'\e0'} is the end of the string.