* href="https://www.w3.org/TR/html401/appendix/notes.html#h-B.2.2">using the non-standard
   * semicolon</a>, rather than the ampersand, as a parameter delimiter. Nevertheless, we recommend
   * using the ampersand unless you must interoperate with systems that require semicolons.
   *
   * <p><b>Note:</b> Unlike other escapers, URL escapers produce <a

   * href="https://www.w3.org/TR/html401/appendix/notes.html#h-B.2.2">using the non-standard
   * semicolon</a>, rather than the ampersand, as a parameter delimiter. Nevertheless, we recommend
   * using the ampersand unless you must interoperate with systems that require semicolons.
   *
   * <p><b>Note:</b> Unlike other escapers, URL escapers produce <a

//
// All values are true except for the ASCII control characters (0-31), the
// double quote ("), the backslash character ("\"), HTML opening and closing
// tags ("<" and ">"), and the ampersand ("&").
var htmlSafeSet = [utf8.RuneSelf]bool{
	' ':      true,
	'!':      true,
	'"':      false,
	'#':      true,
	'$':      true,
	'%':      true,
	'&':      false,
	'\'':     true,

2149          ; mapped                 ; 006A          # 3.2  DOUBLE-STRUCK ITALIC SMALL J
214A..214B    ; valid                  ;      ; NV8    # 3.2  PROPERTY LINE..TURNED AMPERSAND
214C          ; valid                  ;      ; NV8    # 4.1  PER SIGN
214D          ; valid                  ;      ; NV8    # 5.0  AKTIESELSKAB
214E          ; valid                                  # 5.0  TURNED SMALL F