[Pagination] Example passes string for pageSize, breaking getRangeLabel

[tom10271]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

When I set page size to 1 then go to next page, it should changes from 1 - 1 of 100 to 2 - 2 of 100. Then next page again it should be 3-3 of 100

When I set page size to 2 then go to next page, it should changes from 1 - 2 of 100 to 3 - 4 of 100. Then next page again it should be 5-6 of 100

What is the current behavior?

When I set page size to 1 then go to next page, it changes from 1 - 1 of 100 to 2 - 20 of 100. Then next page again it should be 3-30 of 100

When I set page size to 2 then go to next page, it changes from 1 - 2 of 100 to 3 - 22 of 100. Then next page again it should be 5-42 of 100

What are the steps to reproduce?

https://material.angular.io/components/paginator/examples

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

I am just trying to test it for the first time

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

Angular 5.0.3
Angular Material 5.0.0-rc.1

Is there anything else we should know?

Plunkr example is not working too(In most of the time for other examples too actually)
angular/material.angular.io#334

[andrewseguin]

The example takes the form field's value for the page size and passes it to the MatPaginator. However, it's being passed as a string, which is fine for all the operations the paginator does (e.g. multiply page size by page index) but getRangeLabel does startIndex + pageSize which coerces to a string rather than uses the size as a number.

Will need to fix this by using coerceNumberProperty

[mhosman]

This fix is available in last build? I have the same error with the last version (5.0.2).

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