vectors with numbers are writable byt vectors with string not ! How to write as new line to existing dlm file any vector from Array{Any} ?

```
julia> open("mytestfile.txt", "a") do io
writedlm(io, A[2,:]')
end
julia> A
3×3 Array{Any,2}:
"a" "a" "a"
2 2 2
3 3 3
julia> open("mytestfile.txt", "a") do io
writedlm(io, A[1,:]')
end
ERROR: MethodError: no method matching adjoint(::String)
Closest candidates are:
adjoint(::Missing) at missing.jl:79
adjoint(::Number) at number.jl:193
adjoint(::Adjoint) at C:\cygwin\home\Administrator\build
v0.7\LinearAlgebra\src\adjtrans.jl:104
...
```