[Templates] Converting from old template language which allows nested tags into TT template

[Buddy Burden]

Mark,

> Well, because _ is a valid subroutine/variable name char, it would require surrounding whitespace, at least in
> certain contexts. I believe that's what did it in. Nothing to do with readability/typability.

They had already addressed that, tho.  Larry said in the relevant Apocalypse:

> The only downside to that is the space between a variable name and the operator is required. This is to be construed
> as a feature.

So I dunno.  _ works well in TT2, as we see.  And anyways, if you're going to toss _, where did ~ come from?  Just seems 
like a desperate choice to me (i.e. "now, which piece of punctuation do we have left over ... ?").


		-- Buddy