Remove stray quotes; probably left over from conversion from docstrings.

Doc/lib/xmlsaxreader.tex

@@ -197,7 +197,7 @@ methods:
   This method is called after close has been called to reset the
   parser so that it is ready to parse new documents. The results of
   calling parse or feed after close without calling reset are
-  undefined."""
+  undefined.
 \end{methoddesc}