with with a single expression
[% with title='Hello World' fill site/header %] --EOF--look inside...
Thus Spake Andy:
We can remove the braces because the block contains only a single expression.
This is key to the flexibility of TT3's language. Rather than defining
similar (but subtly different) directives like
instead have smaller, simpler units like
fill that can be
plugged together to make more complex expressions.