bug#27158: 25.2; Eliminating old usage of completing-read from built-in files

[Dmitry Gutov]

On 6/2/17 12:04 AM, Ryan Thompson wrote:

> I'll be testing this out to see if it works acceptably well in all 
> cases.

Does it work well in the "don't want any default" case?

> Comments welcome.

'prepend-empty-string' sounds like what I'd expect; 
'append-empty-string' doesn't sounds particularly useful (what's the 
goal here?); 'Any other value' kind of looks like over-engineering.