$ unichars -g '/[[:punct:]]/ != /\p{punct}/'
U+0024 ‭ $  GC=Sc DOLLAR SIGN
U+002B ‭ +  GC=Sm PLUS SIGN
U+003C &#8237; <  GC=Sm LESS-THAN SIGN
U+003D &#8237; =  GC=Sm EQUALS SIGN
U+003E &#8237; >  GC=Sm GREATER-THAN SIGN
U+005E &#8237; ^  GC=Sk CIRCUMFLEX ACCENT
U+0060 &#8237; `  GC=Sk GRAVE ACCENT
U+007C &#8237; |  GC=Sm VERTICAL LINE
U+007E &#8237; ~  GC=Sm TILDE

##</code><code>##

$ 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

##</code><code>##

@lines = do { local $/; split /\R/, <INPUT> };