After trying to work out why my concatenated filepath wasn’t displaying properly I just found out from the docs that:
// Slashes do not display in notes but don’t worry.
// They’re stored in the variable.
It seems that the author actually meant backslashes as the following will attest on a Windows machine.
Is there a clever way around this to still display backslashes - without having to resort to slash substitution for a note situation (they work fine using messageOk)?