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A general description is here.
‘identical’ could in rare cases generate a warning about non-pairlist attributes on CHARSXPs. As these are used for internal purposes, the attribute check should be skipped. (Reported by Niels Richard Hansen).
The ‘plot.TukeyHSD’ function now uses a line width of 0.5 for its reference lines rather than ‘lwd = 0’ (which caused problems for some PDF and PostScript viewers).
The ‘big.mark’ argument to ‘prettyNum()’, ‘format()’, etc. was inserted reversed if it was more than one character long.
‘R CMD check’ failed to check the filenames under ‘man’ for Windows' reserved names.
New S4 reference class utility methods ‘copy()’, ‘field()’, ‘getRefClass()’ and ‘getClass()’ have been added to package ‘methods’.