Re: vpasolve to find all real roots for multiple nonlinear equations and multiple variables

[Colin Macdonald]

BTW, I filed a bug about the printing problems (extra `--`) in some of
your expressions.  Follow here if you wish:

https://github.com/cbm755/octsympy/issues/458

Also, `vpasolve` only supports scalar equation.  Documentation does not
make that clear!  I filed a bug to either fix that or at least make the
documentation clearer:

https://github.com/cbm755/octsympy/issues/459

best,
Colin