Bug, feature request, or proposal:

I think there is a bug in the file src/lib/core/breakpoints/data/orientation-break-points.ts

What is the expected behavior?

The media queries in there use (orientations: ...) rather than (orientation: ...) - note the pluralisation in the word orientations. I believe the singular form is the correct version, see here: https://developer.mozilla.org/en-US/docs/Web/CSS/@media/orientation

What is the current behavior?

What are the steps to reproduce?

What is the use-case or motivation for changing an existing behavior?

To improve the product

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Is there anything else we should know?