MoinMoin WikiName and python regexes

[Ara.T.Howard]

hi-

i know nada about python so please forgive me if this is way off base.  i'm
trying to fix a bug in MoinMoin whereby

   WordsWithTwoCapsInARowLike
                     ^^
                     ^^
                     ^^

do not become WikiNames.  this is because the the wikiname pattern is
basically

   /([A-Z][a-z]+){2,}/

but should be (IMHO)

   /([A-Z]+[a-z]+){2,}/

however, the way the patterns are constructed like

   word_rule = ur'(?:(?<![%(l)s])|^)%(parent)s(?:%(subpages)s(?:[%(u)s][%(l)s]+){2,})+(?![%(u)s%(l)s]+)' % {
       'u': config.chars_upper,
       'l': config.chars_lower,
       'subpages': config.allow_subpages and (wikiutil.CHILD_PREFIX + '?') or '',
       'parent': config.allow_subpages and (ur'(?:%s)?' % re.escape(PARENT_PREFIX)) or '',
   }


and i'm not that familiar with python syntax.  to me this looks like a map
used to bind variables into the regex - or is it binding into a string then
compiling that string into a regex - regexs don't seem to be literal objects
in pythong AFAIK...  i'm thinking i need something like

   word_rule = ur'(?:(?<![%(l)s])|^)%(parent)s(?:%(subpages)s(?:[%(u)s]+[%(l)s]+){2,})+(?![%(u)s%(l)s]+)' % {
                                                                       ^
                                                                       ^
                                                                       ^
       'u': config.chars_upper,
       'l': config.chars_lower,
       'subpages': config.allow_subpages and (wikiutil.CHILD_PREFIX + '?') or '',
       'parent': config.allow_subpages and (ur'(?:%s)?' % re.escape(PARENT_PREFIX)) or '',
   }

and this seems to work - but i'm wondering what the 's' in '%(u)s' implies?
obviously the u is the char range (unicode?)...  but what's the 's'?

i'm looking at

   http://docs.python.org/lib/re-syntax.html
   http://www.amk.ca/python/howto/regex/

and coming up dry.  sorry i don't have more time to rtfm - just want to
implement this simple fix and get on to fcgi configuration! ;-)

cheers.

-a
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