Datatable samples have wrong alignment for the numbers

[psalom]

Bug, feature request, or proposal:

Wrong alignment for the numbers in the datatable samples.
Right alignment helps for comparison and calculation.

What is the expected behavior?

Right-aligned numeric columns
Left-aligned text columns

What is the current behavior?

left-aligned numeric columns
Left-aligned text columns

What are the steps to reproduce?

https://material.io/guidelines/components/data-tables.html#data-tables-structure

[andrewseguin]

Are you referring to the material.angular.io examples? Or are you hoping that the table does this automatically?

[psalom]

Yes I think examples must be aligned with the spec. thx a lot

[CDDelta]

@andrewseguin I'm not sure if this is the right place to put it but I think mat-table should provide a directive for specifying numeric columns and automatically align the text for us since it is part of the spec.

[andrewseguin]

Simple columns were added in #14841 that allow clients to just provide simple text for the header and cell as well as the justification (start, end, center)

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