Re: ed -p '' errors, but shouldn't

[Antonio Diaz Diaz]

Antonio Diaz Diaz wrote:
> Note that empty option-arguments are ambiguous. See item 2a of section
> '12.1 Utility Argument Syntax':

Now that the ambiguity has been solved[1], the question remains of whether 
accepting an empty prompt string is useful or is just an indirect way of 
disabling the P command.

The POSIX description of the prompt command states that "The P command shall 
cause ed to prompt", but "prompting" with the empty string is not prompting.

[1] https://austingroupbugs.net/view.php?id=1833

Best regards,
Antonio.