Darwin _defaults completion bug

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Hi Motoi,
	I think I've found a small bug with your _defaults completion (which I 
use all the time).  If I type 'defaults read -g' then hit the Tab key, 
I see a list of possible completions which are quoted *and* escaped 
with a backslash.  Here's what I mean:

% zsh -f
% autoload -U compinit
% compinit -C -d ~/.zcompdump_$ZSH_VERSION
% defaults read -g <TAB>
\"com.apple.AppleShareClientCore\"
\"com.apple.keyboard.fnState\"
\"com.apple.mouse.ignoreTrackpadIfMousePresent\"
\"com.apple.mouse.ignoreTypingFilter\"
\"com.apple.mouse.tapBehavior\"
\"com.apple.sound.beep.feedback\"
\"com.apple.trackpad.scaling\"
AppleAntiAliasingThreshold

...et cetera, et cetera.  The command doesn't work in the escaped + 
quoted form.  If just the quotes are used, the command works.  I've 
looked at _defaults but haven't been able to figure out where the 
escapes are being inserted.  If you get a chance, could you take a 
look?

Thanks,
Ryan