bug#34123: A patch to fix reading EOF characters in non-interactive mode

[Eli Zaretskii]

> From: Shawn Presser <shawnpresser@gmail.com>
> Date: Fri, 18 Jan 2019 04:35:34 -0600
> 
> $ git clone https://github.com/shawwn/y
> $ cd y
> $ bin/y
> > (read t)
> Lisp expression: 42
> 42
> > (read t)
> Lisp expression: ^Derror: Error reading from stdin
> > Error reading from stdin
> $ 
> 
> Notice that it’s currently impossible for non-interactive scripts to recover 
> from EOF when reading from tty.

What would you want such non-interactive scripts to do after recovery?