added :external-format to make-in-memory-output-stream
added :external-format to make-in-memory-output-stream

darcs-hash:20080505181439-6b9e8-7e512a2aca097b19112fb7d602a639522445809f.gz

cl-babel/babel,cl-babel/babel,capitaomorte/babel,capitaomorte/babel,ageldama/babel,ageldama/babel