Example causes error in new installations

Replacing #1 with '#1`, etc. produces this error:

Query filter requires field and constraints separated by a "="

removing the query option produced this traceback:

09:57:33 Trac[formatter] ERROR: Macro Poll(Which of these do you prefer?; !#1; !
#2; !#3; Cheese dip) failed
Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 370, in _
macro_formatter
    return macro.process(self.req, args, 1)
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 109, in p
rocess
    text = self.processor(req, text)
  File "/usr/lib/python2.3/site-packages/trac/wiki/formatter.py", line 99, in _m
acro_processor
    return macro_provider.render_macro(req, self.name, text)
  File "build/bdist.linux-i686/egg/tracpoll/tracpoll.py", line 140, in render_ma
cro
  File "build/bdist.linux-i686/egg/tracpoll/tracpoll.py", line 183, in render_po
ll
  File "build/bdist.linux-i686/egg/tracpoll/tracpoll.py", line 18, in __init__
  File "build/bdist.linux-i686/egg/tracpoll/tracpoll.py", line 29, in load
AttributeError: keys

(In [1156]) Skip invalid tickets. Closes #577.