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‘factor()’ now uses ‘order()’ to sort its levels, not ‘sort.list()’. This makes ‘factor()’ support custom vector-like objects if methods for the appropriate generics are defined. This change has the side effect of making ‘factor()’ succeed on empty or length one non-atomic vector(-like) types (e.g., list), where it failed before.
‘terms.formula()’ ignored argument names when determining whether two terms were identical. (PR#17235)
‘tools::latexToUtf8()’ went into an infinite loop when given certain inputs. (PR#17138)