wrong xml escaping in pdf reports

All reports are calling the method toxml to escape the strings to be formatted in xml.

from report.interface import toxml
'<account id="%d" name="%s">' % (aid, toxml(aname)))

The toxml method is properly escaping the characters according to xml specifications as it escapes < > &
However, if the xml code is created manually with a format string, you need to also escape the " character into &quot;

I suggest this correction in all pdf reports:

- from report.interface import toxml
+ import report.interface
+ toxml = lambda s: report.interface.toxml(s).replace('"','&quot;')