Separator between columns in program listings?

[Nikos Chantziaras]

Is it possible to have a separator (like a thin line) between columns in 
program listings?  It just doesn't look right without one; that is, it's 
not intuitively apparent that there two columns.  Enabling line numbers 
helps a lot, but in most cases I don't need line numbering anyway.

Separator between columns in program listings?

[Nikos Chantziaras]

Is it possible to have a separator (like a thin line) between columns in 
program listings?  It just doesn't look right without one; that is, it's 
not intuitively apparent that there two columns.  Enabling line numbers 
helps a lot, but in most cases I don't need line numbering anyway.

Separator between columns in program listings?

[Nikos Chantziaras]

Is it possible to have a separator (like a thin line) between columns in 
program listings?  It just doesn't look right without one; that is, it's 
not intuitively apparent that there two columns.  Enabling line numbers 
helps a lot, but in most cases I don't need line numbering anyway.