But the comma would make _baby_ refer to the listener as an addressee of the singer (vocative). That is not the meaning the article says is appropriate. Commas

But the comma would make _baby_ refer to the listener as an addressee of the singer (vocative). That is not the meaning the article says is appropriate. Commas are not put between a determiner and its noun so a comma would give a third meaning, turning _another_ into a pronoun.