Update format.lisp
Update format.lisp

Typo and bug
(format t "~:
") -> error
sharplispers/cormanlisp,sharplispers/cormanlisp,binghe/cormanlisp,binghe/cormanlisp,sharplispers/cormanlisp,binghe/cormanlisp,binghe/cormanlisp,binghe/cormanlisp,binghe/cormanlisp,binghe/cormanlisp,sharplispers/cormanlisp,sharplispers/cormanlisp,sharplispers/cormanlisp,binghe/cormanlisp,sharplispers/cormanlisp,sharplispers/cormanlisp