[stringtemplate-interest] maps, length, wrapping

[Terence Parr]

Hi Kay,

Nice ideas about impl.  However, I think it will have to be done in  
the output writer to be really affective.  It seems like a global  
property to me (though individual templates might be able to give a  
length).  This way, the thing that actual spits stuff out can do the  
check (for example, this is how the auto indent works).  Make sense?

Ter