Description of problem:
Ive encountered a ZeroDivisionErrorfloat division error while
performing a diff on the wiki page:
http://fedoraproject.org/wiki/Kadischi/Schedule?action=diff&rev2=18&rev1=17

Version-Release number of selected component (if applicable):


How reproducible:
Everytime

Steps to Reproduce:
1.http://fedoraproject.org/wiki/Kadischi/Schedule
2. click on getinfo
3. request a difference between 17 and 18
  
Actual results:
Differences between revisions 17 and 18
--> -->


ZeroDivisionErrorfloat division Please include this information in
your bug reports!:
Python Python 2.2.3: /usr/bin/python
Linux fedora.linux.duke.edu 2.4.21-32.0.1.ELsmp #1 SMP Wed May 25
14:26:33 EDT 2005 i686
MoinMoin Release 1.3.4 [Revision 1.3.4 release]
Sat Mar 18 08:13:39 2006

A problem occurred in a Python script. Here is the sequence of
function calls leading up to the error, in the order they occurred.

 /usr/lib/python2.2/site-packages/MoinMoin/request.py in
run(self=<MoinMoin.request.RequestCGI instance>)
 916             else:
 917                 try:
 918                     cgitb.Hook(file=self).handle(saved_exc)
 919                     # was: cgitb.handler()
 920                 except:
cgitb = <module 'MoinMoin.support.cgitb' from
'/usr/lib/python2.2/site-packages/MoinMoin/support/cgitb.pyc'>,
cgitb.Hook = <class MoinMoin.support.cgitb.Hook>, file undefined, self
= <MoinMoin.request.RequestCGI instance>, ).handle undefined,
saved_exc = (<class exceptions.ZeroDivisionError>,
<exceptions.ZeroDivisionError instance>, <traceback object>)

 /usr/lib/python2.2/site-packages/MoinMoin/wikiaction.py in
do_diff(pagename=u'Kadischi/Schedule',
request=<MoinMoin.request.RequestCGI instance>)
 162     if request.user.show_fancy_diff:
 163         from MoinMoin.util.diff import diff
 164         request.write(diff(request, oldpage.get_raw_body(),
newpage.get_raw_body()))
 165         newpage.send_page(request, count_hit=0, content_only=1,
content_id="content-below-diff")
 166     else:
request = <MoinMoin.request.RequestCGI instance>, request.write =
<bound method RequestCGI.write of <MoinMoin.request.RequestCGI
instance>>, diff = <function diff>, oldpage = <MoinMoin.Page.Page
instance>, oldpage.get_raw_body = <bound method Page.get_raw_body of
<MoinMoin.Page.Page instance>>, newpage = <MoinMoin.Page.Page
instance>, newpage.get_raw_body = <bound method Page.get_raw_body of
<MoinMoin.Page.Page instance>>

 /usr/lib/python2.2/site-packages/MoinMoin/util/diff.py in
diff(request=<MoinMoin.request.RequestCGI instance>,
old=u'||||||<tablestyle="width: 100% ;color: white;
ba...kground-color: #3074c2">||\n----\nCategoryKadischi\n',
new=u'||||||<tablestyle="width: 100% ;color: white;
ba...kground-color: #3074c2">||\n----\nCategoryKadischi\n')
  94         charmatch = charobj.get_matching_blocks()
  95
  96         if charobj.ratio() < 0.5:
  97             # Insufficient similarity.
  98             if leftpane:
charobj = <difflib.SequenceMatcher instance>, charobj.ratio = <bound
method SequenceMatcher.ratio of <difflib.SequenceMatcher instance>>

 /usr/lib/python2.2/difflib.py in ratio(self=<difflib.SequenceMatcher instance>)
 526         matches = reduce(lambda sum, triple: sum + triple[-1],
 527                          self.get_matching_blocks(), 0)
 528         return 2.0 * matches / (len(self.a) + len(self.b))
 529
 530     def quick_ratio(self):
matches = 0, len undefined, self = <difflib.SequenceMatcher instance>,
self.a = u'', self.b = ''

ZeroDivisionError: float division
     __doc__ = 'Second argument to a division or modulo operation was zero.'
     __getitem__ = <bound method ZeroDivisionError.__getitem__ of
<exceptions.ZeroDivisionError instance>>
     __init__ = <bound method ZeroDivisionError.__init__ of
<exceptions.ZeroDivisionError instance>>
     __module__ = 'exceptions'
     __str__ = <bound method ZeroDivisionError.__str__ of
<exceptions.ZeroDivisionError instance>>
     args = ('float division',)

Expected results:
It should show the difference of revision 17 and 18

Additional info: