And in:
--8<---------------cut here---------------start------------->8---
@defun wait-until-port-writable-operation
Make an operation that will succeed with no values when the output
port @var{port} becomes writable.
@end defun
--8<---------------cut here---------------end--------------->8---
May be need add port at the end of the first line:
--8<---------------cut here---------------start------------->8---
@defun wait-until-port-writable-operation port
Make an operation that will succeed with no values when the output
port @var{port} becomes writable.
@end defun
--8<---------------cut here---------------end--------------->8---
