Hi! There is another little error in `doc/ref/api-io.texi'. The documentation for put-char ends abruptly:
@deffn {Scheme Procedure} put-char port char Writes @var{char} to the port. The @code{put-char} procedure returns @end deffn It should be: @deffn {Scheme Procedure} put-char port char Writes @var{char} to the port. The @code{put-char} procedure returns an unspecified value. @end deffn Josep