Re: [Bug-ed] Undocumented deviation from POSIX - current line after empty insert

[Antonio Diaz Diaz]

Hello,

Ori Avtalion wrote:
> The POSIX standard for the Insert command states:
>
>   the current line is set to the last inserted line or, if there was
> none, to the addressed line
>
> This goes against all implementations of ed that I can find, which set
> the current line to be the inserted line, or, if no input was
> provided, at a line before the addressed line.

Thanks for reporting this.

Maybe all implementations of ed behave the same in corner cases like 
this because all are based on the same Pascal code:
B. W. Kernighan and P. J. Plauger: "Software Tools in Pascal", 
Addison-Wesley, 1981.

I'll look into this as time permits and will either make insert behave 
as POSIX requires, or document the real behavior. Also will fix the 
documentation for append.


Best regards,
Antonio.