bash-completion: completion of multiple port names not supported

[mascguy (Christopher Nielsen)]

Our completion works for the first port name, but fails on subsequent ones.

For example, if one attempts to complete the 2nd port name in this example, it simply returns quietly with no results:

$ sudo port install first_port second_port

My workaround is to add ports right-to-left, starting with completion of the first one - then adding a 2nd as the first one in the list, and so forth - to work around this limitation. But it would be great if that wasn't necessary!