Don't nest block tags inside HTML <p> tags in zExceptions.ExceptionFormatter.

LP #351006

doc/CHANGES.rst

@@ -152,6 +152,9 @@ Features Added
 Bugs Fixed
 ++++++++++
 
+- LP #351006:  Don't nest block tags inside HTML ``<p>`` tags in
+  ``zExceptions.ExceptionFormatter``.
+
 - LP #411837:  Handle resource files with ``.htm`` extention properly,
   as page template resources.
 

src/zExceptions/ExceptionFormatter.py

@@ -208,7 +208,7 @@ class HTMLExceptionFormatter (TextExceptionFormatter):
         return cgi.escape(s)
 
     def getPrefix(self):
-        return '<p>Traceback (innermost last):\r\n<ul>'
+        return '<p>Traceback (innermost last):</p>\r\n<ul>'
 
     def formatSupplementLine(self, line):
         return '<b>%s</b>' % self.escape(str(line))
@@ -223,7 +223,7 @@ class HTMLExceptionFormatter (TextExceptionFormatter):
         return '<li>%s</li>' % line
 
     def formatLastLine(self, exc_line):
-        return '</ul>%s</p>' % self.escape(exc_line)
+        return '</ul><p>%s</p>' % self.escape(exc_line)
 
     def formatExtraInfo(self, supplement):
         getInfo = getattr(supplement, 'getInfo', None)