I thought that two spaces are to discern between the period that ends a mid-sentence abbreviation and one that finishes a sentence. By the way - I think that t

I thought that two spaces are to discern between the period that ends a mid-sentence abbreviation and one that finishes a sentence. By the way - I think that the layout should be dealt with by the software that converts the string of characters to an actual graphical context. Why should I care what font will my text be displayed with? I prefer software that understands "end of sentence", "end of paragraph", maybe "end of abbreviation" (if necessary to make this distinction) and puts whatever amount of whitespace is appropriate for this to look decent. This usually isn't even an integer number of spaces, but rather a fractional one. And yeah, I'm a single-spacer but rather because of laziness than anything else. TLDR: A space in ASCII (or Unicode) encoding of the text != amount of whitespace in layout.