The span around this always gets stripped.
Content in a span only if foo was not defined.
This is a literal dolars sign before
not_a_var: $$not_a_var
$a
- $x is divisible by 3
-
${x} is not divisible by 3,
but it is divisible by ${y}!
${value_of('somevar', 'somevar is not set')}
${Markup('1234&')}
${i} divides by 3
${i} is not a friend of 3
${i} aspires to be a number that divides by 3
${_('')}