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

diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex
index 1edc8bb99c3a2958cad410d0a09f8d1275d01740..5353cfddaa31c6eb3c8326331ff0123c09386678 100644 (file)
--- a/Doc/lib/libstdtypes.tex
+++ b/Doc/lib/libstdtypes.tex
@@ -811,6 +811,7 @@ 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.