docs: improve doctests for ndarray instances in blas/ext/ndarray/scusumors#11551

kgryte merged 2 commits intostdlib-js:developstdlib-js/stdlib:developfrom

udaykakade25:DoctestBlasExtBaseNdarrayScusumorsudaykakade25/stdlib:DoctestBlasExtBaseNdarrayScusumorsCopy head branch name to clipboard