The ASCII device control characters were originally designed to control hardware devices.
Control characters have nothing to do inside an HTML document.

ASCII Character HTML Entity Code Description
NUL � null character
SOH  start of header
STX  start of text
ETX  end of text
EOT  end of transmission
ENQ  enquiry
ACK  acknowledge
BEL  bell (ring)
BS  backspace
HT 	 horizontal tab
 line feed
VT  vertical tab
FF  form feed
 carriage return
SO  shift out
SI  shift in
DLE  data link escape
DC1  device control 1
DC2  device control 2
DC3  device control 3
DC4  device control 4
NAK  negative acknowledge
SYN  synchronize
ETB  end transmission block
CAN  cancel
EM  end of medium
SUB  substitute
ESC  escape
FS  file separator
GS  group separator
RS  record separator
US  unit separator
DEL  delete (rubout)

[hana-code-insert name='ascii' /]