I think the programmers among us are infected by the use of punctuation marks as part of the syntax. Many programming languages just hijack punctuations marks: C's field.selector is plain silly when you think about it and about the fact that the colon was available; and now something less natural than the period must be used to separate statements. As for Haskell, I find that the ML family is IMO quite remarkable for its tradition of terrible syntax choices (again, why x:xs when x,xs was an option? And that convention of putting commas at the beginning of a line!?).

It seems to me that arguing about what a comma means when put in this or that place is symptomatic of this programmer mindset. Natural languages are ambiguous, redundant and sometimes inconsistent by non-design. And so is their punctuation. Nobody understand punctuation, especially programmers.