Just to put in context. If I read using `DelimitedFiles`

the data from a file with a single column of data, with, for example,

```
x = readdlm("./data.txt")
```

`x`

is returned as an `Array{Float64,2}`

with sizes `(n,1)`

. If I try directly to use this array in some `LinearAlgebra`

function, I get an error, which is described by a minimal working example below.

My question is: should this be filled as a bug somewhere? That `DelimitedFiles`

returns an array with dimension 2 is a bug, or `LinearAlgebra`

functions should be able to deal with that pecularity? Or, more globally, is there any reason for the existence of â€śmultidimensional arraysâ€ť which are not really multidimensional?

The issue:

```
julia> using LinearAlgebra
julia> a = ones(2) ; c = zeros(1);
julia> b = ones(2);
julia> mul!(c,transpose(a),b)
1-element Array{Float64,1}:
2.0
julia> b = ones(2,1)
2Ă—1 Array{Float64,2}:
1.0
1.0
julia> mul!(c,transpose(a),b)
ERROR: MethodError: no method matching mul!(::Array{Float64,1}, ::Transpose{Float64,Array{Float64,1}}, ::Array{Float64,2}, ::Bool, ::Bool)
```