In the definition of "things that are probably identifiers", the character ":" has been removed.  Now, "foo:bar" will match as a word, a punctuation symbol, and another word.  Previously, it would have matched in its entirety as an identifier.  Recall that the entire "all" package is ad hoc, designed for no specific use case.  Users may wish to design their own alternative to the "all" package to suit their needs.