Unfortunately, the output is the same in both cases:
bronger@wilson:~$ echo $BASH_COMPLETION /etc/bash_completion bronger@wilson:~$ echo $BASH_COMPLETION_DIR /etc/bash_completion.d bronger@wilson:~$ bash bronger@wilson:~$ echo $BASH_COMPLETION /etc/bash_completion bronger@wilson:~$ echo $BASH_COMPLETION_DIR /etc/bash_completion.d
(I checked whether the completion beheviour was different; it was.)
Unfortunately, the output is the same in both cases:
bronger@wilson:~$ echo $BASH_COMPLETION completion N_DIR completion. d completion N_DIR completion. d
/etc/bash_
bronger@wilson:~$ echo $BASH_COMPLETIO
/etc/bash_
bronger@wilson:~$ bash
bronger@wilson:~$ echo $BASH_COMPLETION
/etc/bash_
bronger@wilson:~$ echo $BASH_COMPLETIO
/etc/bash_
(I checked whether the completion beheviour was different; it was.)