enable pdftex extensions with \usepackage{microtype}

[Shark64]

I've tried to enable microtype and seems to work well (fewer overfull hboxes).
The only problem was hyphenation of 2 section titles, but disabling tracking on those 2 pages seems to fix it.

[mikeshulman]

This is a good idea, but not being very familiar with microtype myself, I'm a little uncomfortable merging it without paging through the entire document to make sure it looks better, and I don't have time to do that myself right now.

[Shark64]

Well, to be fair, i didn't look carefully to the entire book either. In my experience microtype usually works well, it's disabled by default only to make PdfTeX's output 100% equivalent with that of TeX, but the changes are quite subtles so i agree, it's not an high priority bug.

[mikeshulman]

I suppose we could just rely on the magic of github to hope that our readers eventually report any other formatting problems that this introduces. Anyone else have an opinion?

[andrejbauer]

This is a good idea, but I think we do need to page through the entire books (all of them) to catch possible problems. I kindly ask volunteers to try out this pull request and report on how well it works. It's best to take one version of the book and compare the old vs. new. I am mostly worried about the ustrade size because that one gets printed.

[peterlefanulumsdaine]

I’ve asked a question about this on tex.stackexchange — asking what we should be checking for after adding microtype.

In any case: it seems to me more trouble than it’s worth to add microtype to the current edition, since it would require re-proofing the whole book. But for the second edition (if that happens), the book will need to be re-proofed anyway, so there’s presumably no reason not to add it then. So I guess we should keep this PR around, but labelled as “for 2nd ed”?

[mikeshulman]

Makes sense to me.