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

diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex
index cf7437da5c2cdc93dfbb9281b3ab833313cef744..998d6219295d1cd2c90a7ece9aaac3e69ddb2f1b 100644 (file)
--- a/Doc/lib/libstdtypes.tex
+++ b/Doc/lib/libstdtypes.tex
@@ -697,6 +697,7 @@ 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.