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‘configure’ now supports ‘texinfo’ version 6.0, which (unlike the change from 4.x to 5.0) is a minor update. (Wish of PR#16456.)
‘options(OutDec = s)’ now signals a warning (which will become an error in the future) when ‘s’ is not a string with exactly one character, as that has been a documented requirement.
‘prettyNum()’ gains a new option ‘input.d.mark’ which together with other changes, e.g., the default for ‘decimal.mark’, fixes some ‘format()’ting variants with non-default ‘getOption("OutDec")’ such as in PR#16411.
Under some circumstances using the internal PCRE when building R from source would cause external libs such as ‘-llzma’ to be omitted from the main link.