Unexpected behavior for [1,2,3;] 

On beb5486:

``` julia
julia> [1,2,3;]
3-element Array{Int64,1}:
 2
 1
 3

julia> [1,2,3,4;]
4-element Array{Int64,1}:
 3
 2
 1
 4

julia> [1,2;]
2-element Array{Int64,1}:
 1
 2
```

This syntax is not supported on v0.3 (probably because of #8250). I would expect this to behave the same as, e.g. `[1,2,3]`, but maybe that's naive. I definitely wasn't expecting this, though.
