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‘abbreviate(<non-ASCII>)’ now works better, using ‘iswlower()’ and ‘*upper()’ to treat “wide” characters, thanks to Kevin's PR#19058.
‘all(<symbol>)’ signals an error now, as some similar coercions; previously, the coercion of the symbol resulted in ‘NULL’ internally, raised a warning, and could access illegal memory; thanks to Kevin Ushey's PR#19054.