Most standard chat escape sequences can be replaced
with standard C string escapes such as '\r', '\n', '\t'
etc. Additional escape sequences may be embedded in the expect or
reply strings by introducing them with two
backslashes.
\\c
Suppresses the newline at the end of the reply string. This is the
only method to send a string without a trailing return character. It
must be at the end of the send string. For example, the sequence
"hello\\c" will simply send the characters h, e, l, l, o. (not valid
in expect strings.)