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A general description is here.
The ‘"Date"’ and ‘"POSIXt"’ methods of ‘seq()’ allows ‘by = "quarter"’ for completeness (‘by = "3 months"’ always worked).
The methods for ‘all.equal()’ and ‘attr.all.equal()’ now have argument ‘check.attributes’ after ‘...’ so it cannot be partially nor positionally matched (as it has been, unintentionally).
A side effect is that some previously undetected errors of passing empty arguments (no object between commas) to ‘all.equal()’ are detected and reported.
There are explicit checks that ‘check.attributes’ is logical, ‘tolerance’ is numeric and ‘scale’ is ‘NULL’ or numeric. This catches some unintended positional matching.
The message for ‘all.equal.numeric()’ reports a ‘"scaled difference"’ only for ‘scale != 1’.
‘download.file(method = "lynx")’ is deprecated.