Have existing info readers been fixed to be able to process that? No. The issue has never been mentioned before.
It is already fragile and difficult to find cross-references in Info. I am not enthusiastic about making yet another variation to recognize. I think the drawbacks far outweigh the minor benefit. The period is part of the syntax of cross-references, not part of the syntaxes. After all, the period is not typographically correct in other contexts where it is used in Info, either. Neither is the standard double-colon or plenty of other Info things. I don't see a reason to single out this one particular case. k
