missing julia-repl in destructuring docs

[ArnoStrouwen]

No description provided.

[LilithHafner]

Thanks! This is am improvement and mergible as is. To make it even better, it would be ideal to change this and the block above it to jldoctest.

[inkydragon]

The output also needs to be updated.

```jldoctest
julia> map(((x, y),) -> x + y, [(1, 2), (3, 4)])
2-element Vector{Int64}:
 3
 7
```

[LilithHafner]

haha, yes. That is why use use jldoctest.