[Markdown] 특수문자 표시

https://ccambo.blogspot.com/2017/04/markdown_5.html

Symbol	HTML Number	HTML Name	Description
!	!		exclamation point
"	"	"	double quotes
#	#		number sign
$	$		dollar sign
%	%		percent sign
&	&	&	ampersand
'	'		single quote
(	(		opening parenthesis
)	)		closing parenthesis
*	*		asterisk
+	+		plus sign
,	,		comma
-	-		minus sign - hyphen
.	.		period
/	/		slash
:	:		colon
;	&#59;		semicolon
<	&#60;	&lt;	less than sign
=	&#61;		equal sign
>	&#62;	&gt;	greater than sign
?	&#63;		question mark
@	&#64;		at symbol
[	&#91;		opening bracket
\	&#92;		back slash
]	&#93;		closing bracket
^	&#94;		caret - circumflex
_	&#95;		underscore
`	&#96;		grave accent
{	&#123;		opening brace
|	&#124;		vertical bar - pipe
}	&#125;		closing brace
~	&#126;		equivalency sign - tilde
–	&#8211;		en dash