Blank line with the $IsNull

[Fox63]

If you view a custom tag the result will be: name tag unknown. I know that putting the command $IsNull this error is not displayed but a space is inserted instead.
I created this code that allows me to enter both the disc number, if there are more than one in the album, and also the title of the grouped sub-tracks at the same time.

Code

{color: 255,155,0} {font: Segoe UI Semibold;Bold, Italic;10}$If(<N° dischi>>1,$If($Contains(<Sottotitolo tracce>,*)="T",$IsNull(<Sottotitolo tracce>,,$CutLeft(<Sottotitolo tracce>,1)),"Disco n: "<N° disco>$IsNull(<Sottotitolo tracce>,," - "<Sottotitolo tracce>)),<Sottotitolo tracce>)

Everything works fine except that if the disk is single and has no subtracks the first row is empty causing the other tracks to be scaled down.

without $IsNull


with $IsNull

Note that there is a gap between the dividing line and the first track that normally shouldn't be there.

[hiccup]

I know that putting the command $IsNull this error is not displayed but a space is inserted instead.

Perhaps consider initially posting in 'Questions' instead of in 'Bugs' more often?

This is not a bug.
$IsNull does not create spaces. Your own formula does.
(between {color} and {font})

[Fox63]

I know that putting the command $IsNull this error is not displayed but a space is inserted instead.

Perhaps consider initially posting in 'Questions' instead of in 'Bugs' more often?

This is not a bug.
$IsNull does not create spaces. Your own formula does.
(between {color} and {font})

Just think, I tried everything and thought it was a bug of that $IsNull command. I have not seen the obvious. In fact, once that space was removed, everything went fine.
I'm sorry I made a mistake, I'll try to be more careful.