DollarAnd
From Scriptwiki
$& is used to split one long line over multiple lines for script readability.
$&
Examples
echo -atg This is a really long line that, if there were complicated coding identifiers and variable names, $& would get really confusing and cramped without the added help of the $& identifier.
While this seems useless, if there was a heavy use of identifiers and such throughout the line, it would help make it much more readable.