Equality check returns vector

Is the following intended?
```julia
julia> using PyCall

julia> x = rand(3);

julia> PyObject(x) == PyObject(x)
3-element Vector{Bool}:
1
1
1
```
In https://github.com/SciML/OrdinaryDiffEq.jl/issues/1402 a user reported an error that seems to be caused by this behaviour.

Reproduce the PyCall example from issue #900 and compare the equality result with the behavior reported in OrdinaryDiffEq.jl issue #1402. Trace the PyObject equality path to determine whether a vector result is intended, and add coverage or documentation that makes the expected behavior clear.

Escrito por el modelo de indexación a partir del texto del issue.