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LaTeX style file ‘upquote.sty’ is no longer included (the version was several years old). A much later version is commonly included in LaTeX distributions but does not play well with the ‘ae’ fonts which are the default for Sweave vignettes.
‘plot()’ for ‘TukeyHSD’ objects did not balance ‘dev.hold()’ and ‘dev.flush()’ calls on multi-page plots. (PR#15449)