disable interpretation of backslash escapes (default)
--help
display this help and exit
--version
output version information and exit
If -e is in effect, the following sequences are recognized:
\0NNN
the character whose ASCII code is NNN (octal)
\\
backslash
\a
alert (BEL)
\b
backspace
\c
suppress trailing newline
\f
form feed
\n
new line
\r
carriage return
\t
horizontal tab
\v
vertical tab
NOTE: your shell may have its own version of echo, which usually supersedes
the version described here. Please refer to your shell's documentation
for details about the options it supports.
