$ unichars '/ ^ \R $ /x'
U+000A  -- GC=Cc LINE FEED (LF)
U+000B  -- GC=Cc LINE TABULATION
U+000C  -- GC=Cc FORM FEED (FF)
U+000D  -- GC=Cc CARRIAGE RETURN (CR)
U+0085  -- GC=Cc NEXT LINE (NEL)
U+2028  -- GC=Zl LINE SEPARATOR
U+2029  -- GC=Zp PARAGRAPH SEPARATOR