All,

What causes this:

>     $ whence -m mplayer
>
>     $ whence mplayer
>     /usr/bin/mplayer
>
>     $ whence -m mplayer
>     /usr/bin/mplayer

I know I should have quoted the first time, but it seems strange that I 
didn't have to quote the third time.
Is this a bug or a feature?