Well of course, when Wirth hurriedly defined Pascal keypunches (almost universally made by IBM, even if rebadged) rarely had braces ("curly brackets" to the unwashed). The result was that he initially allowed BCPL-style /* */ as digraphs to enclose a comment, before characteristically deciding to break an existing convention and use (* *) instead. I believe that there has been earlier discussion of the extent to which FPC (etc.) distinguishes between digraphs and lexemes in this situation.
Finally, I would remind everybody that I started this thread as a focus for the "braces vs begin-end" discussion, and as somewhere that the next irritating tyro who suggested a gross change could be pointed. And while I tried to make the arguments in my initial post fairly robust, I chose the subject name carefully: would anybody unfamiliar with the trope
please read
https://en.wikipedia.org/wiki/A_Modest_Proposal and consider my points in that context.
MarkMLl