Comment # 11 on bug 1167952 from Dr. Werner Fink

(In reply to Michal Suchanek from comment #10)
> Does reverting the offending commit reported upstream sound like the right
> thing?
> 
> The revert supposedly completes directories reliably at the cost of
> generating duplicate completions.
> 
> This may cause issues with some more convoluted completion scripts that
> count the number of completions returned and behave differently based on
> that.
> 
> Not sure if any of the included scripts do so.

If this really mmatters, that is the current behaviour is breaing the workflow
of many users out there, then yes we should revert it.

Btw: the mentioned upstream issue is about spaces in file names ... sounds like
quoting is missed somewhere in _filedir() or a shell function below