write-string to write a string to a character output stream.
stream-write-string stream string &optional start end => result
The generic function
stream-write-string is used by
write-string to write string to stream. The string can, optionally, be delimited by start and end.
The default method provided by
fundamental-character-output-stream uses repeated calls to
There is an example in Stream output.
LispWorks User Guide and Reference Manual - 13 Feb 2015