I was looking at that string and testing it a bit more (after it’s been 
canonized, of course.)

Underscores aren't captured in the original, which a lot of us use -  e.g.e, 
$somestring_t

This captures those:  \$[_a-zA-Z0-9]*   All I did was add the underscore 
between the [].

What I’m not sure how to do (well, I’m unwilling to spend the time, because 
WTH) is capture spaces within a variable name.

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