Anatoly Pulyaevskiy bb119e95fa Make dividers one device pixel thick as defined in Material design spec (#10523)
* Make dividers one device pixel thick as defined in Material design spec

* Updated divider test to check stroke width

* Clarified dividers with 0 height in the docs

* Updated Divider.height docs according to PR feedback
2017-06-12 21:47:56 -07:00
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