Hack around the "2.1.6 Blank lines" bug in a way that the TOC still

displays a recognizable section title (there are extra blanks at the
end of it now, due to the nested anchor, but that's fine).

Doc/tools/prechm.py

@@ -274,18 +274,20 @@ class HelpHtmlParser(HTMLParser):
 
     def anchor_bgn(self, href, name, type):
         if self.proc:
+            # XXX See SF bug <http://www.python.org/sf/546579>.
+            # XXX index.html for the 2.2.1 language reference manual contains
+            # XXX nested <a></a> tags in the entry for the section on blank
+            # XXX lines.  We want to ignore the nested part completely.
+            if len(self.hrefstack) == 0:
                 self.saved_clear()
                 self.hrefstack.append(href)
 
     def anchor_end(self):
         if self.proc:
+            # XXX See XXX above.
+            if self.hrefstack:
                 title = cgi.escape(self.saved_get(), True)
                 path = self.path + '/' + self.hrefstack.pop()
-            # XXX See SF bug <http://www.python.org/sf/546579>.
-            # XXX index.html for the 2.2 language reference manual contains
-            # XXX nested <a></a> tags in the entry for the section on blank
-            # XXX lines.  We want to ignore the nested part completely.
-            if len(self.hrefstack) == 0:
                 self.tab(object_sitemap % (title, path))
 
     def start_dl(self, atr_val):