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‘abbreviate(<non-ASCII>)’ now works better, using ‘iswlower()’ and ‘*upper()’ to treat “wide” characters, thanks to Kevin's PR#19058.
In an R installation without NLS, e.g., from ‘--disable-nls’ configuration, the C ‘ngettext()’ replacement now also keeps plural for “0 things”, thanks to Michael Chirico's PR#19065.
‘as.data.frame.vector(<row.names_w/_NA>)’ now signals the same error as ‘data.frame()’, fixing Hervé Pagès' PR#19059.
‘cut(1:11, {})’ now signals an error for the invalid ‘breaks’, fixing PR#19057, thanks to Kevin Ushey.