Typo in ts code of Progress Spinner Example

[holo-michael-simarta]

Bug, feature request, or proposal:

bug

What is the expected behavior?

"Primary" radio button should be selected

What is the current behavior?

Radio button not selected

What are the steps to reproduce?

Providing a Plunker (or similar) is the best way to get the team to see your issue.
Plunker template: http://plnkr.co/edit/o077B6uEiiIgkC0S06dd
https://material.angular.io/components/component/progress-spinner
Change

export class ProgressSpinnerConfigurableExample {
color = 'praimry';

to

export class ProgressSpinnerConfigurableExample {
color = 'primary';

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

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

Is there anything else we should know?

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