Update docs? hidden="yes" does not work if var has name before paramse.g. &foo

[zitot]

Edit: I see now that the var needs to not have a name (well, it needs the name parameter, but it needs to be &

 

[Marco Kalter]

The correct syntax is indeed & instead of &something. For substitution variables without any additional properties, and for compatibility reasons, it
can also be &something.