The 'make-string-output-stream' function creates and returns an unnamed
+output stream. The stream can then be used as any other stream object.
+
+
Examples
+
+
+(make-string-output-stream) ; returns #<Unnamed-Stream: #2d9c0>
+
+(setq out (make-string-output-stream)) ; returns #<Unnamed-Stream: #2d95c>
+
+(format out "fee fi fo fum ") ; \
+(format out "I smell the blood of ") ; fill up output stream
+(format out "Elmer Fudd") ; /
+(get-output-stream-string out) ; returns "fee fi fo fum I smell the blood of Elmer Fudd"
+
+(format out "~%now what") ; add more to output stream
+(get-output-stream-string out) ; returns "\nnow what"
+
+(format out "hello") ; add more to output stream
+(read out) ; returns HELLO
+