Nathan Shively-Sanders 657c469d4f Remove undefined from optional spread properties ...

Fixes #16509 by making the change from #15938 less strict. This is
technically a hole, but it's not as big a hole as before #15938.

2017-06-14 10:31:11 -07:00

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Remove undefined from optional spread properties

2017-06-14 10:31:11 -07:00