pagelist corrupt html output when reload a wiki page

[nextime]

When reload a wiki page containing pagelist:something pagelist plugin cause an error in the log:

12:34:55 Trac[__init__] ERROR: 'TracPageList.web_ui.PageListModule' object has no attribute 'get_htdocs_dirs'
Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/trac/web/modpython_frontend.py", line 206, in handler
    dispatch_request(mpr.path_info, mpr, env)
  File "/usr/lib/python2.3/site-packages/trac/web/main.py", line 139, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.3/site-packages/trac/web/main.py", line 107, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.3/site-packages/trac/web/chrome.py", line 166, in process_request
    for dir in [os.path.normpath(dir[1]) for dir
  File "/usr/lib/python2.3/site-packages/trac/core.py", line 165, in __getattr__
    raise AttributeError, "'%s' object has no attribute '%s'" % (cls, name)
AttributeError: 'TracPageList.web_ui.PageListModule' object has no attribute 'get_htdocs_dirs'

This cause errors in formatting html output of trac

[Noah Kantrowitz]

Fixing formatting.