patch #1462498: handle entityrefs in attribute values.
diff --git a/Doc/lib/libsgmllib.tex b/Doc/lib/libsgmllib.tex
index 27bf0b0..592c191 100644
--- a/Doc/lib/libsgmllib.tex
+++ b/Doc/lib/libsgmllib.tex
@@ -95,12 +95,15 @@
should be used to support semantic interpretation of the start tag.
The \var{attributes} argument is a list of \code{(\var{name},
\var{value})} pairs containing the attributes found inside the tag's
-\code{<>} brackets. The \var{name} has been translated to lower case
-and double quotes and backslashes in the \var{value} have been interpreted.
+\code{<>} brackets. The \var{name} has been translated to lower case.
+Double quotes and backslashes in the \var{value} have been interpreted,
+as well as known entity and character references.
For instance, for the tag \code{<A HREF="http://www.cwi.nl/">}, this
method would be called as \samp{unknown_starttag('a', [('href',
'http://www.cwi.nl/')])}. The base implementation simply calls
\var{method} with \var{attributes} as the only argument.
+\versionadded[Handling of entity and character references within
+ attribute values]{2.5}
\end{methoddesc}
\begin{methoddesc}{handle_endtag}{tag, method}