@wtsnjp when we started this a couple of months ago none of those links would have worked, now all three work on overleaf and the luatex one works on latexonline, I hope we'll get platex and uplatex working in latexonline before long:-)
@UlrikeFischer -- Not yet. I'll try now. (I have to download the new pdfcrop where it won't disable access to the "production" version. Can you remind me where to retrieve it, please?)
@barbarabeeton it is here: github.com/ho-tex/pdfcrop. Probably you will have to replace the original pl-script for tests. putting it in a local texmf imho don't work (at least it normally doesn't work for me).
(@UlrikeFischer) -- I just put pdfcrop.pl into an otherwise inaccessible directory with some existing small pdf files and just ran it: pdfcrop -margin 6 xxx.pdf there were no unexpected messages and the output looks good. Then I ran convert to get xxx.png, and acain the output looks good. I think that's the best I can do.
@PauloCereda -- No. Dried corn kernels, thawed frozen peas, things like that. Not just dried bread crusts. Not Nutella -- save that for yourself (when you're pretending to not be a duck), but not on pizza.
@PauloCereda -- I don't know Ada, but comma, period, and a small space are definitely used. The important point is, the break is always at the thousands. Maybe the Romans had something to do with it, since M is an important unit. (I'll have to look up older number systems sometime.)