properly show transpose expressions

```julia
# Before
julia> :([1 2 3; 4 5 6; 7 8 9]')
:($(Expr(:', :([1 2 3;4 5 6;7 8 9]))))

# After
julia> :([1 2 3; 4 5 6; 7 8 9]')
:([1 2 3;4 5 6;7 8 9]')
```