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‘head(x, n)’ and ‘tail()’ default and other S3 methods notably for _vector_ ‘n’, e.g. to get a “corner” of a matrix, also extended for ‘array’'s of higher dimension, thanks to the patch proposal by Gabe Becker in PR#16764.
‘cm.colors(n)’ etc no longer append ‘alpha=1’ codes ‘"FF"’ to all colors. Hence all eight ‘*.colors()’ functions and ‘rainbow()’ behave consistently, PR#17659.