angular 2 material matTooltip multiline

I'm new to Angular 2 Material. What's the preferred way to make a tool tip multi-line?

For example, I might have the following tool tip:

AA BBBBBBBBBB CCCC DDDDD


And, I may want to to have it display in a multi-line format like this:

AA BBBBBBBBBB
CCCC
DDDDD

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