[css3-text] Automatic 'punctuation-trim' ?

Wow, good timing on the new draft - I just happened to be looking at  
vertical properties. Anyway, I was looking at the 'punctuation-trim'  
property and was wondering if there shouldn't be more control here,  
or at least a setting to allow/forbid trimming (say, 'auto' and  
'never'). There are cases, at least in Japanese, where trimming of  
full-width punctuation may happen even when it is not adjacent to  
other punctuation. This trimming may be automatic, in order to better  
fit text on a line. I can imagine wanting to turn that on and off,  
and this seems like a reasonable place to do it.

--Brady