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‘R CMD check’ skips vignette re-building (with a warning) if the ‘VignetteBuilder’ package(s) are not available.
‘round()’ and ‘signif()’ now longer tolerate wrong argument names, notably in 1-argument calls; reported by Shane Mueller on R-devel (mailing list).
‘source(*, echo=TRUE)’ no longer fails in some cases with empty lines; reported by Bill Dunlap in PR#17769.
‘on.exit()’ now correctly matches named arguments, thanks to PR#17815 (including patch) by Brodie Gaslam.