[Consistency] Definition of the properties of the output

[lezcano]

Some functions such as linalg.qr define the properties that the outputs should have---Q orthogonal, R upper-triangular---but others such as linalg.eigh do not.

I believe that it would be best to specify the properties that these matrices should have in the definition of each function.

cc @rgommers @mruberry

[rgommers]

Makes sense to me to improve the descriptions here, thanks @lezcano .